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.
The first Pan-Am conference was called by the U.S. Secretary of State James Blaine.
<span>The direct political administration of india by the british government (the raj) lasted for </span>90 years
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