How did industrialism transform the American economy following the Civil War? - 1 sentence - 1 piece of evidence

Improved production methods. The use of machines in manufacturing spread throughout American industry after the Civil War. With machines, workers could produce goods many times faster than they could by hand. The new large manufacturing firms hired hundreds, or even thousands, of workers.

nativists tried to get rid of the immigrants as they thought they were going to ruin the u.s.  

a drastic rise in oil prices ended decades of postwar.