Protests, Pettitions, and Riot.
The main reason why the US joined the war was because multiple attack on passenger and merchant ships with submarine attacks .The final straw was when the RMS Lusitania by a German u-boat going to Liverpool England .
Invasions by Barbarian tribes
Economic troubles and overreliance on slave labor
Because of the fur that was plentiful. There was a huge demand for beaver fur coats and hats, and they wanted the territory for it.
