Early American entry would transform both world wars at sea

How much changes if the United States enters both world wars at the beginning?

The naval balance shifts sharply because American forces build combat experience sooner and reinforce Allied operations from the outset.

In the Second World War, US fast battleships could reinforce British operations before Japan entered, potentially confronting Bismarck alongside Prince of Wales. In 1914 the fleets were closer in training standards than in 1917. Integration would be easier before years of British wartime gunnery and operations widened the experience gap.