C. The Treaty of Versallies. This treaty was the most important of the peace treaties that brought an end to World War One. It punished Germany harshly for it's part in the war.
The British was fighting because they had to, America was fighting for freedom. but the big advantage is America was fighting on their own land so they knew the terrain and everything
Peaceful protest, Complaining to the US Supreme Court, and showing how they were just normal people by helping the country advance in technology, (Katherine Goble, etc)
They had to deal with segregation,
Discrimination in the workplace, limited jobs due to rascism,
and terrible education.
You can talk about the boarder crisis along the Estonian boarder and Russian boarder. The is called a crisis because there is a tradition steeped kingdom called the Seto caught directly in the middle of it(their kingdom is split half and half).