Final answer:
Sherman's March to the Sea is the campaign that best represents the total war strategy, involving widespread destruction and demoralization of the enemy by targeting both military and civilian resources.
Step-by-step explanation:
The strategy of total war is most clearly exemplified by Sherman's March to the Sea. During this campaign, the Union army, under the command of Major General William Tecumseh Sherman, aimed to demoralize the Confederacy by destroying everything in its path. This is evident from the account of Sherman's forces devastating Georgia, looting homes, destroying crops, and burning orchards as they marched from Atlanta to Savannah, which fell on December 21, 1864. While the Shenandoah Valley Campaign and the Siege of Petersburg also involved comprehensive military engagements, it was Sherman's March to the Sea that was a classic instance of the total war strategy that sought to break the enemy's will by targeting both military and civilian resources systematically.