How was the military operation regarding the Normandy invasion primarily classified?

The operation regarding the Normandy invasion is primarily classified as an amphibious assault due to the nature of the operation itself, which involved a coordinated assault on the beaches of Normandy, France, during World War II on June 6, 1944. This large-scale military operation required forces to attack from the sea, landing troops and equipment directly on the beaches while simultaneously providing support from the air and naval forces. The operation's success depended on the effective combination of naval firepower, aerial support, and the landing of soldiers, tanks, and supplies on the coast, which are characteristic features of an amphibious assault.

The other classifications, such as air raid, ground assault, and naval blockade, do not fully encapsulate the complexity and strategy of the Normandy invasion. While there was certainly air support and ground combat involved, the defining characteristic was the simultaneous landings from the sea, which is why the amphibious assault classification is the most accurate.