The Largest Amphibious Campaigns of World War II

Germany's North African defeat opened up the possibility of taking the war in the west to the European continent for the first time since France's lightning conquest by the Wehrmacht in 1940. The British and Americans debated the merits of landing in France directly in 1943, but they ultimately opted against it. The Soviets railed at the Westerners as “bastards of allies” – conveniently forgetting that they aided and abetted Hitler's violent expansionism in eastern Europe for over a year, starting in 1939 – but a 1943 “D-Day” style landing in France might have proven a strategic and logistical impossibility.

Despite the gargantuan scale and the importance of Operation Husky, the invasion of Sicily has since taken a backseat to the landings on D-Day. The invasion across the Channel came in the early morning hours of June 6, 1944. That day, forever known as D-Day, the Allies commenced Operation Overlord by staging the largest and most complex amphibious invasion in human history. The complex operation would require tightly coordinated naval and air bombardment, paratroopers, and even inflatable tanks that would be able to fire on fortifications from the coastline, all while landing over 150,000 men across nearly 70 miles of French beaches. Given the incredibly complex plan, it’s no surprise that General Eisenhower had already written a letter apologizing for the failure of the invasion, which he carried in his coat pocket throughout the day, but the operation’s success eventually guaranteed the liberation of Paris and victory in Europe.

By the time the second Philippines campaign started, Japan was on the defensive, but as they would prove in other places like Iwo Jima and Okinawa, Japanese soldiers would act fanatically before admitting defeat or surrendering. During this second major Philippines campaign, an estimated 330,000 Japanese died, and only a bit more than 10,000 were willing to be taken prisoner. In fact, some Japanese soldiers engaged in guerrilla warfare on the Philippines well after the campaign had ended and even after Japan had formally surrendered, prompting the Japanese emperor to personally make a visit and intervene to end the fighting.

Okinawa witnessed every conceivable horror of war both on land and at sea. American ground forces on Okinawa had to deal with bad weather (including a typhoon), anti-tank moats, barbed wire, mines, caves, underground tunnel networks, and fanatical Japanese soldiers who were willing to use human shields while fighting to the death. Allied naval forces supporting the amphibious invasion had to contend with Japan’s notorious kamikazes, suicide pilots who terrorized sailors as they frantically tried to shoot down the Japanese planes before they could hit Allied ships. As The Marine Corps Gazette noted, “More mental health issues arose from the Battle of Okinawa than any other battle in the Pacific during World War II. The constant bombardment from artillery and mortars coupled with the high casualty rates led to a great deal of men coming down with combat fatigue. Additionally the rains caused mud that prevented tanks from moving and tracks from pulling out the dead, forcing Marines (who pride themselves on burying their dead in a proper and honorable manner) to leave their comrades where they lay. This, coupled with thousands of bodies both friend and foe littering the entire island, created a scent you could nearly taste. Morale was dangerously low by the month of May and the state of discipline on a moral basis had a new low barometer for acceptable behavior. The ruthless atrocities by the Japanese throughout the war had already brought on an altered behavior (deemed so by traditional standards) by many Americans resulting in the desecration of Japanese remains, but the Japanese tactic of using the Okinawan people as human shields brought about a new aspect of terror and torment to the psychological capacity of the Americans.”