Code names are a vital part of military planning;
another means to maintain security. Operation Sledgehammer
was the name given to a proposed landing on the Cherbourg
peninsula in 1942 while Operation Jubilee was the
codename for the Anglo-Canadian landing at Dieppe
in August 1942. Operation Starkey was a plan to invade
Europe in 1943, so was Operation Round-Up; Operation
Rankin was the scheme to invade early, if the Germans
withdrew. Operation Bolero covered the build-up of
American forces in Britain.
The two that concern us are Operation Neptune, the
naval side of the invasion that ended on the Normandy
beaches and Operation Overlord, the land battle.