Final answer:
Total war is when war is waged on the opponent's Homefront civilian population, with no distinction between military and civilian targets. General William T. Sherman's March to the Sea was an example of total war during the American Civil War.
Step-by-step explanation:
The correct answer is 1) Total war. When war is waged on the opponent's Homefront civilian population, it is known as total war. Total war is a state of war in which the government makes no distinction between military and civilian targets, and mobilizes all resources, extending its reach into all areas of citizens' lives.
In the case of General William T. Sherman's March to the Sea during the American Civil War, it was a form of total war as Sherman intentionally targeted civilian infrastructure, resources, and population centers. His goal was to demoralize the Confederacy and hasten their surrender.