Which event was the catalyst for the secession of the first seven southern states in 1961

What is the name for the main idea behind the settling of western lands by americans in the early-1800s?

When did martin luther king, jr. deliver his famous "i have a dream" speech? a. during the montgomery bus boycott b. during the birmingham campaign c. during his acceptance of the nobel prize d. during the march on washington

How did the supreme court decision in the slaughterhouse cause have an affect american business