The main purpose of General Sherman's "March to the Sea" in 1864 was to

convince France and Britain to get out of the war

capture the important railroad depot of Charleston

permanently destroy Georgia's ability to produce cotton

destroy the South's strategic and economic capacity to fight

its D : destroy the South's strategic and economic capacity to fight

Explanation:

sherman destroyed everything in his path during the "march tothe sea". he did whats know to the railroads as "bow tieing them" when they could not be straightened back out and be destroyed making the trains useless and set fire to atlanta destroying their stuff for the war.

It's either B or D ... I'm leaning more towards D tho.