The largest amphibious assault in history was in the Okinawa in April 1945. There were 156,000 men involved in the landings in Normandy, and 183,000 men in the intial Okinawa landings, increasing over the next few weeks to 250,000 men. Allied losses in Normany were a little more than 4,000 KIA vs more than 12,000 KIA…