The 1944 doctrine was developed by the United States between the wars. The USN/USMC modelled possible future operations in the Pacific, shaped by the technologies available and under development at the time. Based on Landing Operations Doctrine (1938), it emphasized 6 key capabilities: Command, Control and Communication, Ship-to-Shore Movement, Naval fire support, Air support (in its myriad guises), Establishment of a Beachhead and Sustainment. It required isolation of the target, preliminary bombardment, swift combinedarms assault and immediate follow-on support. Prior to Normandy, the doctrine had been tested in Sicily and elsewhere but was far from foolproof as the landings at
Salerno and Anzio showed. The challenge for the Allies in 1944 was to create the conditions in France from which further operations could be prosecuted. While some limited local surprise was anticipated, the Germans knew that such an assault was imminent but were uncertain of its exact location. For the Allies, the shorter the distance to Berlin, the better. Normandy was selected – less well protected than the Pas de Calais but closer to the German centre of gravity (Berlin) than a landing further south. Four beaches allowed for the landing of significant numbers quickly and across a relatively broad front, complicating the German response.
Modern doctrine has advanced significantly and any cursory glance at the current library, particularly the USN/USMC ‘Littoral Operations in a Contested
Environment’ (LOCE) and ‘Expeditionary Advanced Base Operations (EABO)3’ among others, illustrates the point well. Recognising technological advances, particularly in the Indo-Pacific area, acknowledged by the USA as the most dangerous potential flash point, modern doctrine reflects the emerging need to address Anti-Access (A2) (those actions/capabilities, normally long-range, that prevent an opposing force from entering an operational area) and Area-Denial (AD) (actions/capabilities, normally of a shorter range, that are designed to limit freedom of action within the operational area) in order to protect and maintain freedom of navigation and action.
And future littoral operations are unlikely to be constrained to the purpose of gaining a lodgement or a beachhead. They are more likely to be a part of a wider effort, potentially contributing to key maritime missions such as strike or sea control. This is likely to continue to develop as AI and the full potential of unmanned systems at sea (surface and sub-surface), on the land and in the air increasingly influence the shape of conflict.