Which natural resource became more available to the American public as a result of railroad expansion?

Why are primary sources important when studying historical events

Brainliesttt !me : ) -what is invisible warfare?

What was one of the advantages that the united states had over europe regarding the industrial revol the united states had a continuous supply of potential factory worker the united states imported workers from europe to work in factories. the workers in the united states were more skilled than the workers in europe the united states didn't actively participate in the industrial revolution. instead they imported most of their goods from other countries.