One of the major things that led to the collapse of the German army/navy and their war effort was internal fighting among the Germans themselves regarding tactics.
Answer:
Wilson cited Germany's violation of its pledge to suspend unrestricted submarine warfare in the North Atlantic and the Mediterranean, as well as its attempts to entice Mexico into an alliance against the United States, as his reasons for declaring war.
(https://history.state.gov/milestones/1914-1920/wwi#:~:text=Wilson%20cited%20Germany%27s%20violation%20of,his%20reasons%20for%20declaring%20war.)
Explanation:
Because of the French and Indian war. Taxes were the only way to pay for that war. The British thought that the Americans had to pay some of the tax for protection.
