The pre-1890 expansion period in the US was marked by economic expansion (expansionism) fueled by, industrial growth, demand for fertile land, economic opportunities, and used economic policies after the closure of the revolutionary war while the post-1890 American expansion (19th C) was marked by imperialism, military expansion and formulation of policies to increase US powers, i.e. US signed a treat with China to gain diplomatic and trade relations resulting in the US taking over the Pacific ports.
George Washington- He was the commander in chief of the continental army that fought against the British and won, soon becoming the president of the U.S.
Thomas Jefferson- He was the author of the Declaration of Independence
Congress decides the President
The action or an act of abolishing a system, practice, or institution.
