Answer:
1. the war of 1812 was fought with some Native American allies and a little help from Spain
2. the Trail of Tears was the mass displacement of thousands of Native Americans
3. the Mexican War was a conflict sparked between the US and Mexico when Texas was annexed
4. free African American men participated in this war and played a very vital role in it (i cant think of any other group that had to do with this)
5. Great Britain was involved in this bc it was pretty much an official letter to them that said "stay away from our land or and we'll stay away from yours"
6. the Acquisition of Florida was an event that resulted in a treaty being m1ade between Spain and the US where Florida was given to the US
7. the Louisiana Purchase, of course, was a trade agreement with France
Hope this helps :)