At the start of the project, the Germans were still advancing through the Soviet Union, and the Solomon Islands were still actively contested. U-Boats were doing a number on convoys.
Victory over Germany wasn't a sure thing until late 1944. The fact that U.S. leadership had the foresight to make a massive investment in the Manhattan Project at a time where half of the US Navy's carriers were out of action speaks a lot of them.
Victory over Germany wasn't a sure thing until late 1944. The fact that U.S. leadership had the foresight to make a massive investment in the Manhattan Project at a time where half of the US Navy's carriers were out of action speaks a lot of them.