Amphibious operations
Amphibious landing vehicle - with mermaids (1945)
The history of amphibious operations reflects the complex and risky business of naval landings.
The Liddell Hart Centre for Military Archives has a good collection of material relating to the landings at Gallipoli in Turkey in 1915 which proved a failure in the end.
Twenty-nine years later, D-Day operations and the invasion of Normandy, in contrast, made use of innovative engineering to provide the Allies with a technological edge, not least to clear beaches of mines and other defences and facilitate the landing of men and materiel.