4. what was a cotton gin? in what industry did factories first develop?

The cotton gin was a machine that made it faster to separate cotton from its seeds.  The cotton industry was the first industry that made the first factory in 1790 based on textile manufacturing from England. The iron industry however was a great leap in mass production using factories. Eli Whitney in 1798 started making interchangeable  parts in rifles.

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.