How did sherman help defeat the south?

Answer 1

By trying a completely new strategy after the capture and burning of Atlanta.

After a brief and unsuccessful attempt to pursue the Army of Tennessee through the mountains, as ordered by Grant, Sherman turned South-East and laid waste to the rich farmland of Georgia, with almost no Confederate troops to stop him.

This was an attack on the infrastructure that supported the Confederacy, and it shattered civilian morale. (After endorsing the new plan, Grant said "Make Georgia howl" - and it did.)

Few could doubt that this shortened the war by months.

Answer 2

He marched his troops through the south, stole some horses for his men then shot all the horse and men fighting for the south. but he did not kill any innocent men, women or children.

Answer 3

Sherman's victory at Atlanta gave the voters hope that the end was near; so, Lincoln defeated McClellan, and the South was sunk.