Tactically, it gave him a chance to forget about his vulnerable supply-line and live off the land.
Strategically, the wrecking of farms and railroads would help to starve the Confederate troops in the field and end the war quicker than attacking the armies.
General sherman.
The March to the Sea
Georgia
Because General Sherman marched to Savannah, GA.. which is near the sea.
leading the union army on sherman's march.
General Sherman
Georgia - and then the same in South Carolina
because he felt like it
In may of 1864 general grant ordered general sherman to march his army out of chattanooga into Georgia.
Sherman
The Atlantic
Sherman