Genesis of the Stomach Churners: Motor Landing Craft & Landing Craft Mechanised...

Walter Pollock's written contribution combines X-lighter specifications with his claim to have designed the original powered landing craft.

The First World War X-lighter, or Black Beetle, established a powered bow-ramp ship-to-shore capability but was better suited to reinforcement than a contested assault.

Interwar landing-craft development was slowed by disagreement over whether the Army or Royal Navy should define requirements and pay for the boats.

Britain could have built landing craft and amphibious auxiliaries outside naval-treaty limits, but the Ten Year Rule and tight budgets kept construction experimental and sparse.

Sloops within the stated speed, displacement, and armament limits could be built in unrestricted numbers, making funding a separate question from treaty ceilings.

Interwar design work preserved lessons from Gallipoli and plans for amphibious ships, but Britain built neither a large landing-craft inventory nor the parent ships needed to operate one.

Interwar exercises turned lessons from Gallipoli into practical tests of landing-craft speed, seakeeping, and the compromises imposed by a flat ramp bow.

Britain's small interwar MLC series used waterjets to reduce the risk of beach damage, but the choice carried a serious speed penalty compared with propeller propulsion.

At the outbreak of war, six Motor Landing Craft were based in Britain and three at Malta, dividing the nine-craft force between home waters and the Mediterranean.

The tiny prewar MLC force carried troops in Norway and at Dunkirk and suffered severe losses. Only one of nine craft is said to have remained after Operation Dynamo, although the stated loss totals do not fully reconcile with that figure.

Trials of the 1926 MLC prompted a requirement to land a 12-ton tank across a beach, while heavier vehicles were initially expected to use a wharf.

British Assault Landing Craft and Mechanised Landing Craft became Landing Craft Assault and Landing Craft Mechanised under shared Anglo-American wartime terminology.

A propulsion proposal by Fleming prompted competitive trials whose best ideas were combined into the platoon-sized Landing Craft Assault produced in thousands during the war.

Mobile naval basing and Royal Marines requirements gave the Navy reasons to keep funding landing craft as committee work developed into formal training.

The mature LCM reached about seven and a half knots, carried a 16-ton tank, and was incorporated into early plans for twelve-craft amphibious ship groups.

Great Western and Southern Railway works developed construction methods distinct from shipyards and became important builders of wartime LCMs.

At Narvik, an LCM delivered a French Hotchkiss H39 while the tank fired during the landing. The action was an early Allied combined-arms amphibious assault under enemy fire.

Small numbers of interwar landing craft served in several early campaigns and suffered heavy losses while providing the design foundation for wartime expansion.

Landing craft remain the overlooked link that lets naval and air superiority deliver troops ashore before an opponent can exploit delay.