What is the tactic of slash and burn?

The tactic of slash and burn is to have troops invade an area vital to an enemy force, say a farm that produces food for that army, and steal all you can carry and destroy or burn the rest to deny the enemy production. It is extremely effective on production and moral of enemy soldiers to attack their home and destroy vital assets. In the civil war general Sherman used it in his famous march to Georgia burning all the farms along the way to cut off food supplies and demoralize confederate troops away from home at war.