Question

what led the USA to join the world war​

Answer 1

Answer:

Germany's resumption of submarine attacks on passenger and merchant ships in 1917 became the primary motivation behind Wilson's decision to lead the United States into World War I. ... Germany also believed that the United States had jeopardized its neutrality by acquiescing to the Allied blockade of Germany.

Explanation:

Answer 2

Explanation:

Japan provoked usa

basically Japan attacked on us harbour which provoked usa to drop bombs at Hiroshima and Nagasaki which led to war