What led to europe's involvement in world war ii? how many years did it take the united states to become involved in world war ii? two three four they never commited to the war; they only supplied money and weapons.

When Hitler invaded Poland the rest of Europe started in their involvement to stop Hitler. The US started getting involved into WW2 two years later when Pearl Harbor was attacked by the Japanese

Germany's military build up and invasions of multiple European countries is what led to Europe's involvement in World War II. It took America two years into the war before getting involved.

i'm asking the same thing i asked this other cat all of