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Oregon Trail
A wagon road stretching 2170 miles from Missouri to Oregon's Willamette Valley, this was a big trail that was used by many to transport there family, this supports my answer no because it played a big role. -
Manifest Destiny
the United States is destined—by God, this made the Americans want to spread the word and give everyone the DESTINY so they wanted to spread the word so it helped westward expansion -
first dishwasher
This effected expansion heavy because of the greatness of not having to be near a constant water sauce people can explore and move to their desired places -
Telegraph Invented
By the telegraph being invented it gave the pioneers a new way to communicate via train code, thus gave them more of a reason why they can expand and move away to stay in touch with loved ones. -
transcontinental railroad 1862-1869
"A transcontinental railroad in the United States is any continuous rail line connecting a location on the U.S. Pacific coast with one or more of the railroads of the nation's eastern trunk line rail systems operating between the Missouri or Mississippi Rivers and the U.S. Atlantic coast(https://en.wikipedia.org/wiki/Transcontinental_railroad) -
Homestead Act 1862
"provided that any adult citizen, or intended citizen, who had never borne arms against the U.S. government could claim 160 acres of surveyed government land"(Homestead Act (1862) - National Archives |https://www.archives.gov ) this gives people more of a reason to expand, -
the frontier closed
"the Census Bureau broadcast the closure of the frontier, meaning that in the west there was no apparent tracts of land without settlers"(https://schoolhistory.co.uk) this stopped expansion but shows how amazing it worked.