I think is the Nullification crisis and the war he fought.
        
             
        
        
        
Answer:
Post -Civil war reconstruction.
Explanation:
During years the politic of United States was the overseas expansion ( Ocean to ocean).
Many Americans did move to territories in the west and the south. This expansionism always was a force in American History,
But during the time of the civil war   while the nation was torn apart, the expansion came to a halt after that time the US started rebuilding and expanding again. 
 
        
             
        
        
        
Answer:
Feudalism had two enormous effects on medieval society.
Explanation:
(1) First, feudalism discouraged unified government. Individual lords would divide their lands into smaller and smaller sections to give to lesser rulers and knights. ... (2) Second, feudalism discouraged trade and economic growth.