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Lodgement

Lodgement is a term denoting a designated area in a hostile or potentially hostile operational that, when seized and held, enables the continuous landing of troops and to support further operations. This concept is central to forcible entry operations, particularly amphibious assaults, where initial forces establish a secure foothold against resistance to facilitate the buildup of combat power. In modern doctrine, lodgements are critical for projecting power into contested areas, often involving joint forces from , , and sometimes domains to overcome (A2/AD) challenges. They differ from mere beachheads by emphasizing sustained control and expansion, allowing for the transition from to decisive . The establishment of a lodgement requires meticulous , including on enemy defenses, for resupply, and to fortify the position against counterattacks. Historically, lodgements have proven pivotal in major conflicts, shaping the outcomes of campaigns through their success or failure. During in 1944, Allied forces created a massive lodgement in , , which served as the launchpad for liberating from Nazi occupation. In the , the Inchon landing in 1950 established a lodgement behind North Korean lines, reversing the tide by cutting supply routes and enabling the UN counteroffensive. Earlier, the 1915 exemplified the risks, as Allied attempts to secure a lodgement on the Peninsula faltered due to entrenched defenses and logistical issues, resulting in a costly . These examples underscore the lodgement's role as a high-stakes enabler of strategic surprise and operational momentum in .

Definition and Characteristics

Core Definition

In military doctrine, a lodgement (also spelled lodgment) is defined as a designated area in a hostile or potentially hostile operational area that, when seized and held, makes the continuous landing of troops and materiel possible and provides maneuver space for subsequent projecting forces inland from the sea or from the air. This concept is central to joint forcible entry operations, where the lodgement serves as a secure base for building combat power against opposition. Alternatively, a lodgement can be described as a designated area, such as an , , or combination thereof, that affords the continuous of troops and while enabling space for follow-on operations. It represents an expanded and defended position that supports the projection of forces beyond the initial . Unlike a basic or initial , which focuses on gaining a foothold, a lodgement emphasizes the critical phase of expansion, securing rear areas out of direct enemy fire, and establishing sustainment to facilitate broader operational objectives. Bridgeheads or often serve as the starting points for developing into a full lodgement.

Key Characteristics and Requirements

A lodgment is characterized by its physical attributes, which must encompass defensible suitable for securing against immediate threats, hubs to facilitate the buildup of supplies, and adequate space for troop assembly and initial operations. This space must provide sufficient depth to enable the deployment of forces without excessive to , often incorporating natural features such as rivers or coastlines for flank protection, alongside developed or improvised landing zones like beaches or airfields. These elements ensure the lodgment serves as a viable for expansion, allowing continuous ingress of personnel and while mitigating risks from contested environments. Defensive requirements are integral to a lodgment's viability, demanding the rapid establishment of fortifications, anti-artillery positions, and integrated air defense systems to counter potential enemy counterattacks. Neutralization of immediate threats within the area, through ground maneuvers or supporting fires, is essential, complemented by measures such as coordinating lines and control to deconflict friendly operations and protect vulnerable assembly points. These defenses transform the initial into a sustainable position, emphasizing layered security that includes barriers, bunkers, and counter-air capabilities to maintain control against armed opposition. Logistically, a lodgment relies on secure lines of communication via or air to enable rapid and sustainment, often requiring prepositioned stocks or expeditionary for handling supplies, , and medical support. Initial forces must operate with limited external aid, carrying 3 to 60 days of essential supplies depending on the entry method, while follow-on capabilities establish ports of debarkation or staging bases to support extended operations. This ensures the lodgment can transition from an foothold to a hub for larger force projections without interruption. Temporally, establishing a lodgment involves a swift progression from temporary seizure during the assault phase to stabilization as a more permanent base, typically demanding 24 to 72 hours of intense initial defense to consolidate gains before reinforcing elements arrive. This phase-based evolution—encompassing , , stabilization, and of forces—prioritizes speed to exploit , with the overall duration influenced by objectives and enemy responses to achieve operational continuity.

Etymology and Terminology

Historical Origin of the Term

The term "lodgement" derives from the "logement," meaning lodging or quartering of troops, which entered English in the late primarily through military contexts referring to temporary billets or accommodations for soldiers. The earliest recorded use appears in 1598 in Robert Barret's "The Theorike and Practike of Moderne Warres," a on contemporary and tactics, where it denotes the act of establishing a secure position for forces. This initial application reflected the word's roots in providing during campaigns, evolving from the verb "lodge," which by around 1200 included the sense of encamping an army. By the 17th and 18th centuries, "lodgement" gained prominence in texts, particularly in descriptions of and amphibious operations, where it signified an entrenched foothold or position captured and held against opposition. In the context of Marlborough's campaigns during the , for instance, contemporary accounts describe forces effecting a "lodgement on the " at sieges like in 1702, highlighting its role in breaching fortifications. This usage solidified the term's conceptual shift from mere quartering to a strategic asset in contested terrain, as seen in period dictionaries defining it as a work constructed by besiegers within enemy defenses. In the , the term became formalized in and American military doctrine, especially for expeditionary and colonial operations involving forcible entry and sustained presence in hostile areas. tactical manuals of the era, such as those outlining and procedures, integrated "lodgement" as a key objective for securing beachheads or inland positions during imperial campaigns. Similarly, U.S. texts from the period adopted it for amphibious and overland expeditions, emphasizing its importance in enabling and . This doctrinal embedding reflected broader advancements in tactics, transforming the term into a standard element of . The modern U.S. Department of Defense definition retains this essence, describing a lodgement as a designated area seized in hostile territory to facilitate troop landings and inland projection.

Spelling Variations and Modern Usage

The spelling of the term reflects regional variations in English usage: "lodgement" is the standard form in , as adopted by the in its doctrinal publications, while "lodgment" prevails in , particularly in U.S. Department of Defense materials. These variants are mutually intelligible and interchangeable in denoting the military concept of a secured operational area, though official documents adhere to the respective national conventions to ensure terminological consistency. In modern , the term is firmly embedded in multinational and national frameworks for joint operations, emphasizing its role in . employs "lodgment" to describe a designated area on a hostile or potentially hostile shore that, when seized and held, enables the continuous landing of troops and to support subsequent operations ashore, as outlined in Allied Tactical Publication-08. U.S. joint similarly defines "lodgment" as a designated area in hostile or potentially hostile territory that facilitates the ongoing reception of forces and provides space for further military actions, integral to forcible entry planning. This usage underscores the concept's application in contemporary scenarios requiring rapid , such as amphibious or assaults to establish initial footholds. Beyond military applications, "" appears in contexts, notably in jurisdictions, where it refers to the formal submission or filing of legal documents or tax returns with authorities, as seen in revenue procedures for declarations. Despite these extensions, the term's dominant and specialized connotation persists in , where it encapsulates critical operational principles for securing and expanding entry points in contested environments.

Strategic Role in Military Operations

Importance in Forcible Entry

In , a lodgement serves as a critical base for , enabling the buildup of forces necessary to overcome enemy defenses and facilitate advances into inland areas. By securing a designated foothold in hostile territory, it allows for the continuous landing of troops and , providing essential space for subsequent operations. This function transforms an initial into a sustainable operational hub, amplifying the attacking force's ability to project combat power against adversary centers of gravity. Lodgements play a pivotal role in , particularly in amphibious, airborne, and operations, where they enable the transition from high-intensity assault phases to prolonged sustainment. According to U.S. joint doctrine, forcible entry operations rely on seizing such areas to integrate sea-based mobility, capabilities, and ground maneuvers, ensuring synchronized domain operations. The U.S. Marine Corps emphasizes this in its expeditionary concepts, viewing forcible entry through amphibious means as a that establishes lodgements to support decisive actions ashore. Key characteristics, such as suitability and proximity to routes, further enable this doctrinal application by providing defensible yet expandable positions. Failure to establish or expand a lodgement carries severe risks, potentially isolating forces and leading to their defeat by enemy counterattacks, thereby halting broader . This vulnerability underscores the imperative for rapid and neutralization of nearby threats to prevent operational . On a broader scale, successful lodgements facilitate joint operations by integrating naval, air, and land forces under unified command, enhancing cross-domain and enabling the seamless incorporation of follow-on multinational elements.

Factors for Establishing and Defending a Lodgement

Establishing a lodgement requires achieving air and naval superiority to neutralize enemy threats and enable unhindered force projection, as outlined in joint doctrine for entry operations. This involves counterair operations, electronic warfare, and anti-submarine measures to protect assault routes and landing zones from anti-access/area denial (A2/AD) systems. Surprise is critical, attained through deception, stealth insertions, and operational security to disrupt enemy decision cycles and exploit vulnerabilities before reinforcements arrive. Initial assault waves, comprising initial entry forces such as airborne or amphibious units, seize key terrain to secure the beachhead or airhead, with phased landings building combat power rapidly via parachute, helicopter, or surface means. Engineering efforts focus on breaching obstacles, clearing minefields in surf zones and egress routes, and constructing temporary infrastructure like causeways to facilitate movement inland. Defending the lodgement demands integrated defenses to counter enemy counterattacks, including from naval surface , , and landed artillery to suppress incoming threats and neutralize enemy artillery positions. Minefields and layered barriers, emplaced by combat engineers and mine warfare units, form perimeter defenses seaward and landward, with mobile reserves held in readiness for rapid counterattacks or reinforcement of critical sectors. plays a pivotal role, providing real-time assessment of enemy dispositions through joint preparation, assets, and standoff sensors to anticipate and disrupt counteroffensives. All-around perimeter security, supported by coordination measures and airspace control, ensures protection against air, ground, and threats while expanding the lodgement. Sustainment is essential to maintain operational tempo and prevent , relying on robust supply chains that leverage prepositioned stocks, seabasing, and joint logistics over-the-shore capabilities for continuous delivery of , , and via air and . prioritizes rapid casualty treatment and transport using dedicated casualty receiving ships, hospital assets, and aircraft to minimize losses and sustain force readiness. Rotation of forces occurs through , , onward , and processes, deploying follow-on echelons to relieve initial units and build depth, with transitioning ashore as develops. Challenges in establishing and defending a lodgement include terrain limitations that restrict mobility and suitable landing sites, weather conditions affecting sea states, visibility, and aircraft operations, and enemy reinforcements that exploit time delays to mass forces against the lodgement. Advanced A2/AD capabilities, such as coastal defenses and precision munitions, further complicate expansion by threatening lines of communication and resupply efforts. Success is often measured by achieving sufficient depth inland, allowing space for follow-on forces, maneuver flexibility, and transition to offensive operations while securing initial objectives.

Historical Examples

Ancient and Early Modern Examples

One of the earliest examples of a proto-lodgement in occurred during the Great's invasion of the Empire in 334 BCE, when he forced a crossing of the Granicus River in northwestern . Facing a force of approximately 40,000 troops positioned along the eastern bank, rejected cautious advice to delay and instead led a daring with his and , wading through swift currents under arrow fire to establish a on the enemy side. This foothold allowed his Macedonian army of about 35,000 to rout the Persians, killing key satraps and securing the regional Greek cities of as supply bases, thereby enabling further expansions into territory without immediate counterattacks. In the Second Punic War (218–201 BCE), the employed a classic lodgement strategy in northeastern under Gnaeus Cornelius Scipio, who landed a fleet of 60 ships at the Greek colony of Emporion (modern ) in October 218 BCE. This naval operation delivered two legions and allied contingents totaling 20,000–25,000 men, securing a coastal foothold amid Carthaginian dominance in the region following 's advance into . Scipio quickly built alliances with local Iberian tribes north of the River, leveraging diplomatic overtures and victories like the Battle of Cissa, where he defeated Carthaginian commander Hanno and captured Indibilis of the Ilergetes, to detach Spanish support from . These efforts transformed Emporion into a strategic base for Roman operations, disrupting Carthaginian supply lines to and facilitating joint campaigns with Scipio's brother , which pinned down Punic forces in for years. During the Seven Years' War, the established a pivotal lodgement at through an amphibious assault led by Major-General in September 1759. With naval support from Vice Admiral Charles Saunders' fleet controlling the , Wolfe's 5,000 troops executed a nighttime at Anse-au-Foulon, a lightly defended cove upstream from the fortified city, using flat-bottomed boats to evade batteries. Scaling steep cliffs under cover of darkness, the captured a small guard post and advanced to the undefended , securing a lodgement that positioned to threaten directly. This maneuver forced commander to attack prematurely, resulting in a decisive on and the city's five days later, marking a turning point in Britain's North American conquests.

World War II Examples

One of the most significant lodgements was established during , the Allied invasion of , , on June 6, 1944. Initial landings involved approximately 156,000 troops across five beaches—Utah, Omaha, , , and —supported by an unprecedented naval armada of over 7,000 vessels and air forces comprising more than 11,000 aircraft that provided bombardment and cover. The beachheads, initially narrow and vulnerable to German counterattacks, were rapidly reinforced with airborne drops of around 24,000 paratroopers from the U.S. 82nd and 101st Airborne Divisions and British 6th Airborne Division, securing key inland objectives to link the coastal lodgements. By the end of June, the Allied front had expanded to about 97 km, and by early July 1944, following sustained logistics involving over 2 million tons of supplies via artificial Mulberry harbors, it stretched beyond 100 km, allowing for the eventual breakout during . This lodgement exemplified mid-20th-century amphibious operations through integrated mechanized infantry, tank support, and overwhelming air-naval superiority, enabling advances across the European theater. Operation , the launched on July 10, 1943, demonstrated lodgement establishment under counterpressure. U.S. forces of the Seventh Army, totaling around 66,000 troops under General , secured beachheads at in the Gulf of Gela amid rough seas and paratrooper misdrops, while British Eighth Army elements, numbering about 115,000 under General , captured Syracuse on the southeast coast with minimal opposition after airborne assaults. forces, including Italian and German divisions, mounted fierce counterattacks, notably at on July 11–12, where over 1,000 Italian troops and 200 tanks assaulted the U.S. 1st Infantry Division but were repelled by naval gunfire from destroyers and . Despite these threats, the lodgements held, allowing Allied forces exceeding 150,000 to push inland; Syracuse was fully consolidated within hours, and 's perimeter expanded to 10 km deep by July 12. The operation culminated in Sicily's capture by August 17, 1943, after 38 days of fighting involving advanced like LSTs and coordinated armor-infantry tactics, though over 100,000 German troops evacuated to the Italian mainland. The Anzio Landing, codenamed Operation Shingle on January 22, 1944, illustrated the challenges of sustaining a lodgement against rapid enemy reinforcement. U.S. VI Corps, comprising the 3rd Infantry Division, British 1st Division, and attached Rangers and Commandos—totaling about 36,000 men—landed unopposed at Anzio and Nettuno, 50 km south of Rome, capturing the port intact and establishing a 7-mile-deep beachhead by January 24. Supported by 467 ships and 1,200 aircraft, the initial advance reached 14 km inland toward Cisterna and Campoleone but stalled 2–4 km short due to German Tenth Army reinforcements swelling to 70,000 troops by January 29, including the 26th Panzer and Hermann Göring Divisions. German counteroffensives from January 30 to March 5, involving up to 110,000 troops in the newly formed Fourteenth Army, inflicted heavy casualties—over 3,500 German losses in one assault alone—but were contained by Allied artillery (432 guns) and air superiority, confining the lodgement to a 20 km by 12 km area during four months of trench-like defense. The breakout began on May 23, 1944, with seven divisions pushing through Cisterna, linking with southern forces and capturing Rome by June 4, highlighting the logistical demands of mid-century lodgements reliant on sea supply lines vulnerable to artillery and air interdiction.

Post-World War II Examples

One prominent post-World War II example of a lodgement occurred during the Korean War with the Inchon Landing, known as Operation Chromite. On September 15, 1950, United Nations forces under General Douglas MacArthur launched an amphibious assault at Inchon, a port city approximately 110 miles behind North Korean lines, to establish a strategic foothold that would disrupt enemy logistics and force a retreat from South Korea. The operation involved roughly 75,000 troops, primarily from the U.S. 1st Marine Division and 7th Infantry Division, supported by a naval task force of 230 ships, including escort carriers, cruisers, and landing craft that delivered 53,882 personnel, 6,629 vehicles, and over 25,000 tons of cargo by September 21. This lodgement succeeded in recapturing Seoul by September 28, resulting in 14,000 North Korean People's Army casualties and 7,000 captures, while enabling a breakout from the Pusan Perimeter and shifting the war's momentum. Defending the lodgement relied on rapid reinforcement and naval gunfire support to counter North Korean counterattacks. In the of 1982, British forces established a critical lodgement at San Carlos Water on Island. On May 21, approximately 4,000 troops from , including and Parachute Regiment units, conducted an amphibious assault using helicopters for vertical envelopment and to secure beachheads amid the sheltered . This operation marked an evolution in lodgement tactics, emphasizing air mobility alongside sea lift in a distant, contested environment far from main bases. Despite intense Argentine air threats that sank six British ships and damaged over a dozen others during the ensuing "Bomb Alley" battles from May 21 to 25, the lodgement held, allowing ground forces to advance inland toward the Argentine garrison at Stanley. The foothold proved decisive, contributing to the Argentine surrender on June 14 and the full recapture of the islands. Defending against air assaults involved integrated air defenses and naval escorts to protect the vulnerable insertion points. Post-Gulf War humanitarian operations in 1991 exemplified air-centric lodgements through Operation Provide Comfort, aimed at protecting Kurdish refugees in northern Iraq. Following the suppression of a Kurdish uprising after the coalition's victory, over 760,000 Kurds fled into the mountains; in response, coalition forces rapidly established airhead lodgements at sites like Zakho, Sirsenk, and Dohuk starting April 15 to create safe havens and waystations. U.S. Marines from the 24th Marine Expeditionary Unit (Special Operations Capable), supported by the Army's 10th Special Forces Group and contingents from Britain, France, the Netherlands, and Italy—totaling over 20,000 troops—employed airmobile insertions via CH-46E and CH-53E helicopters from units like HMM-264, deploying from bases in Turkey and delivering more than 1 million pounds of supplies in the first two weeks despite operating 500 miles inland. These lodgements facilitated the resettlement of refugees and enforced a no-fly zone, stabilizing the region until December 1996. The defense of these airheads incorporated multinational rapid reaction forces and air superiority to deter Iraqi incursions.

References

  1. [1]
    Lodgment Definition - Military Operations Terms - MilitaryDictionary
    1.) A designated area in a hostile or potentially hostile operational area that, when seized and held, makes the continuous landing of troops and materiel ...
  2. [2]
    [PDF] Establishing a Lodgment During Large Scale Combat Operations
    May 23, 2019 · Eighth US Army's theater-level defense around the Pusan lodgment presents historical insights that allow one to understand what aspects ...
  3. [3]
    Chapter 2: PLANNING AND PREPARATION FOR CROSS ...
    Mar 17, 2015 · At the first meeting of the American and British Chiefs of Staff in Washington on 24 December 1941, Field Marshal Sir John Dill, in response to ...
  4. [4]
    Gallipoli: Lessons from the Great War on the Projection of Power ...
    May 14, 2019 · The Gallipoli Campaign in April 1915 is one of the few events in WWI that incorporated land, sea, subsurface, air and multinational ...
  5. [5]
  6. [6]
  7. [7]
  8. [8]
    Lodgement - Etymology, Origin & Meaning
    Origin and history of lodgement. lodgement(n.) also lodgment, "act of lodging," 1590s, from French logement (14c.) "accommodation, lodgings," from Old French ...Missing: military | Show results with:military
  9. [9]
    lodgement, n. meanings, etymology and more
    There are 11 meanings listed in OED's entry for the noun lodgement. See 'Meaning & use' for definitions, usage, and quotation evidence.
  10. [10]
    Lodge - Etymology, Origin & Meaning
    early 14c., "encampment;" late 14c., "temporary accommodation; place of residence," verbal noun from lodge (v.). Related: Lodgings. dislodge · lobby · lodgement ...Missing: military | Show results with:military
  11. [11]
    Marlborough and the War of the Spanish Succession, by Lt.
    Mar 28, 2013 · On July 6, two days after a Dutch battalion had gained a lodgement on the counterscarp, Ostend surrendered. In seven weeks Marlborough had ...
  12. [12]
    A Military Dictionary | Project Gutenberg - The UK Mirror Service
    From the opening of the trenches to the effecting a lodgement on the glacis, about 18 days. 3d. From this time to the capitulation, about 5 days. First ...
  13. [13]
    [PDF] JDN 1/17, Joint Theatre Entry - GOV.UK
    The North Atlantic Treaty Organization (NATO) uses lodgment while the Ministry of Defence uses lodgement. raids; • shows/demonstrations of force; or • ...
  14. [14]
    [PDF] JP 3-18, Joint Forcible Entry Operations - GlobalSecurity.org
    Jun 16, 2008 · It sets forth joint doctrine to govern the activities and performance of the. Armed Forces of the United States in joint operations and provides ...
  15. [15]
    Lodgement vs Lodgment: Unraveling Commonly Confused Terms
    Jul 3, 2023 · “ Lodgement” is the preferred spelling in British English, while lodgment is the preferred spelling in American English. Both spellings are considered correct ...
  16. [16]
    Globalisation, Innovation and Information Sharing in Tax Systems ...
    Jan 7, 2005 · This research applied an eight factor framework to analyse the diffusion and adoption of electronic lodgement of tax returns within Australia.<|separator|>
  17. [17]
    Taxation Administration Act 2001 - Queensland Legislation
    lodge means lodge with the commissioner. lodgement requirement means a requirement under a tax law to—. (a)lodge a document; or. (b)give a document to the ...
  18. [18]
    None
    Summary of each segment:
  19. [19]
    None
    Summary of each segment:
  20. [20]
    From Sparta to Hostomel: The Enduring Role of Joint Forcible Entry ...
    A lodgment is a designated area in a hostile operational environment that affords continuous landing of troops and materiel while providing maneuver space for ...
  21. [21]
  22. [22]
    Sustaining joint forcible entry operations | Article - Army.mil
    Oct 4, 2018 · Joint Publication 3-18, Joint Forcible Entry Operations, defines a forcible entry operation as an operation meant to seize and hold a lodgment ...
  23. [23]
    Alexander's Triumph at Granicus - Warfare History Network
    In the spring of 334 bc, Alexander of Macedon paused with his army on the western side of the Granicus River. Only 22 years old, he had become king of ...The Legendary Alexander Of... · Alexander Marches East · The Victorious AlexanderMissing: BCE bridgehead
  24. [24]
    Second Punic War | UNRV Roman History
    Gnaeus Scipio landed at Emporiae in NE Hispania, in October 218 BC and immediately advanced south, taking control of territory as far as Tarraco.Missing: Emporion | Show results with:Emporion
  25. [25]
    War of two Scipio. Warfare in Spain in 218-211 BCE
    Dec 24, 2021 · Gnaeus moved against this force and defeated it near Cissa, near modern Tarragona. The commander of the Ilergets Indibilis and the Carthaginian ...
  26. [26]
    Battle of Quebec | National Army Museum
    Battle of Quebec · War with France · Opportunity for attack · The armies · Stalemate · Landing · Deployments · Volley fire · The consequences.War With France · Stalemate · Explore Further
  27. [27]
    The Capture of Quebec in 1759 | Proceedings - U.S. Naval Institute
    Monckton made a demonstration off Beauport as though to attack that point, some frigates standing in with his boats as though they were to support the landing.
  28. [28]
    Korean War - History - Inchon Landing (Operation Chromite)
    Sep 16, 2025 · Operation Chromite was the UN assault designed to force the North Korea People's Army (NKPA) to retreat from the Republic of (South) Korea.
  29. [29]
    H-054-1: Inchon Landing and Naval Action in the Korean War ...
    Sep 23, 2020 · The situation dramatically shifted with the stunning success of the Inchon landing and the final breakout of the Eighth Army from the Pusan Perimeter.
  30. [30]
    [PDF] The Falklands War - DTIC
    On May 21, 1982, about 4,000 British troops landed on the northern coast of East Falkland at a place called San Carlos Water.55 The days after the landing ...
  31. [31]
    None
    ### Summary of Operation Provide Comfort