NCES.AH2.H.3 - Understand the factors that led to exploration, settlement, movement, and expansion and their impact on United States development over time.
NCES.AH2.H.3.1
American History II
Analyze how economic, political, social, military and religious factors influenced United States imperialism (e.g., passing of the western frontier, new markets, Spanish American War, Open Door Policy, Monroe Doctrine, Roosevelt Corollary, canal route, etc.).