For the first one The institution of slavery contradicted the foundation of the American society because till this day people of color are still being treated horrendously due to their ancestors and their teachings to the newer generation. Also it contradicted it because Americans had their amendments but it didn’t apply to slaves .
Im guessing they were called "wagon trains". Apologies if i'm incorrect!
Answer:
During the times of the Indian Removal Act, and the famous "Trail of Tears", the president of the time: Andrew Jackson, ordered the removal of several Native Peoples from the Southeastern United States, to the designated indian area in Oklahoma.
The ideas was to make up room for White American Settlers.
During the force evacuation of the Native Peoples, many of them perished due to disease, malnoursihment, or fatigue. This is why the event came to be known as the "Trail of Tears":