Amphibious operations give the attacker important choices about where, when, and in what strength to land. Light troops can establish the first foothold while landing craft bring heavier forces into the breach. The attacker can also launch diversionary landings with light troops or a small armoured element, drawing defenders away from the intended main effort. Concentrating the bulk of the force at a third location then turns mobility and deception into local superiority at the decisive point.
Notable Point · 33:54-34:47
Diversions let an amphibious attacker concentrate the heavy blow
The ability to choose the landing place, time, and force mix lets an attacker draw defenders toward feints before committing armour at the decisive beach.