Where was Sherman's March to the Sea battled at?

Answer 1

There were no battles, to speak of.

Sherman used deception tactics to conceal his route from the few Confederate units in Georgia, and the two sides were never properly engaged.

When he reached Savannah, he was expecting a battle with the small Confederate army under General Hardee, but they escaped across the river into South Carolina.

It was the civilian infrastructure that Sherman was attacking - burning crops and tearing up railroads to wreck the Southern economy and starve the enemy troops in the field.