Title: Military history of the United States.
Question: What treaty ceded territory to the US extending west to the Mississippi River?

Title: Race and ethnicity in the United States Census.
Question: How many ethnicities or federal agencies required to use in data collection?

Title: Indigenous peoples of the Americas.
Question: How many Aboriginal nations evolved trade, as well as spiritual and social hierarchies?

Title: Portugal.
Question:
What were the Moors who converted to Catholicism known as?