You betcha. But America was up to the challenge. The secret sauce of how America's always wins the wars that it does is we generally just out-logistics the other guy. It's generally not that our troops are any more ferocious or brilliant fighters. Fighting a global world war on two huge fronts is something most countries could never do, but America is one of them. But we weren't stupid about it either. A conscious decision was made to defeat the Germans first, and the Japanese second. Also much lesser known, the top most talented U.S. ground force commanders were sent to Europe, not the Pacific, and it shows in a lot of the ground force battles in both places. As planned, the Germans were defeated in May of 1945 first, and the Japanese probably would have taken another entire year to surrender if we had to invade the Japanese home islands, but the dropping of the two atomic bombs sped this timetable up, with the Japanese surrender only three months later. It's a good thing too, because conservative estimates are that US casualties would have been upwards of 1 million dead and wounded if we had to fully invade and occupy the home islands.
