Technology.
World War 1 was the first war in an industrialized age. New weapons and vehicles were used in this war that had never been used before. With the invention of the plane in 1901 led the way for the plane to be used as a gun ship, light bomber, and heavy bomber.
Answer:
he legitimized the United States presidency and set precedents that remain today.
Explanation:
2nd option. Settlers could purchase title to farmlands in the west.
Answer:
It destroyed important railroads that supplied Confederate forces.
