When America sought westward expansion in the 1850s, there were many issues that presented themselves. One major underlying source of tension was slavery and the strife between the North and the South.
America's expansion in the 1900's was because European countries were expanding. America hoped to match them.
Eli Whitney was responsible for the expansion of slavery in America during the 1800's.
Christianity slowly spread and was excepted across North America by relocation and expansion diffusion.
The Pacific Ocean
active and evolving
morning
People wanted to go to the west of America for free land ^^
republican principles
suffrage :) apex
The war led to increased U.S expansion into South America
Japan took part in the World War while America was in its expansion era