> The US entered the war because of Pearl Harbor. The US openly entered the war because of Pearl Harbor. But the US had already been secretly involved in the w

> The US entered the war because of Pearl Harbor. The US openly entered the war because of Pearl Harbor. But the US had already been secretly involved in the war for some time before that. And a major part of that was Lend-Lease aid to the Soviet Union. The case for the US wanting to save Nationalist China from extinction is much less clear since US aid to them was much more lukewarm and inconsistent.