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Steam enginge
Created by James Watt, The steam engine revolutionized travel. This led to easier expansion west with manifest destiny -
Cotton Gin
Eli Whitney's cotton gin helps farms process crops without the need to do it by hand. This eliminated some slave labor for this tedious task -
Steel plow
John Deer creates the first steel plow to help break up the hard ground in the west. This led to better lives out west and survivable conditions.