The implementation of total war was a strategy picked by the Union officers for multiple reasons.
1) Total war will result in the destruction of Southern supplies and transportation. Sherman destroys railroad tracks, burns crops, and ruins plantations so that the Southern army/citizens have no resources to survive.
2) It will bring the Civil War to an end much quicker.
Sherman's idea of destroying the South can be viewed as an immoral action. This is due to the fact that Sherman and his troops will be destroying the land and property of individuals who may not even be part of the war or the Confederate war effort.
The women who weren't sent away in the war to be a nurse stayed behind to keep the men's job's going. They worked in factories, in mines, on railroads, and other jobs that would be labeled as "mens work"
The President in the executive branch can veto a law, but the legislative branch can override that veto with enough votes. The executive branch can declare Executive Orders, which are like proclamations that carry the force of law, but the judicial branch can declare those acts unconstitutional.