Happy Veteran's Day! On D-Day, June 6th, 1944, over 150,000 Allied troops stormed Nazi-defended beaches in northern France in the largest military amphibious assault operation the world had ever seen. D-Day led directly to Allied forces pushing the Nazis back into Germany and winning the war. And D-Day would have never worked without the troop and supply transport boats designed by a colorful boat builder in New Orleans named Andrew Higgins.