What happened to the northern industry during the civil war?

During the Civil War the Northern economy prosper because the were mainly industries, and if you know during a war you need many things such as weapons, supplies, fuel and these thing were produce industries. The government had to pay for all these thing to the companies so therefore greatly increasing the North’s economy. To make a long story short, the South was an agricultural economy with very little industries, so when the war came most men volunteered for the Confederate army or later on go drafted, so there was a shortage of people to work in the southern industries and farms. Most of all the South's people went to work to supply the Confederate armies with food. If you know the South was a great cotton producing part of the world at this time and its main source of money was cotton, the Union blockaded all of the sea around the Confederate States of America which cut of trade, any chance of support from foreign countries, therefore the South with its billions of bales of cotton couldn't be sold and was just left there to rot which greatly damaged the Southern economy. The war was fought on Confederate soil so all the main damages to property was the Confederates. Also During the years of 1864-1865 William Tecumseh Sherman a Union general who broke though Confederate lines and was in Atlanta, Georgia and marching to Savannah, Georgia Sherman practice the art of war called "Total War or Hard War" which means to destroy everything that is civilian and military resources and property, do this Sherman tried to crush the will to fight on and the Confederates supplies. Which greatly crippled the Southern economy. 

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