Final answer:
General William T. Sherman’s March to the Sea was vital to the Union war effort because it disrupted Confederate supply lines, demoralized the Confederacy, and boosted Union morale by capturing key cities.
Step-by-step explanation:
General William T. Sherman’s March to the Sea was a critical campaign during the American Civil War and was important to the Union war effort for several reasons. Primarily, it effectively cut off Confederate supply lines and weakened their overall capacity to maintain the war effort.
Sherman's approach of total war, which included destroying railroads, confiscating livestock, and liberating slaves, demoralized the Confederacy significantly. This strategy not only reduced the Confederates' material capability to wage war but also psychologically undermined their will to continue fighting.
Additionally, the destruction wrought by the Union troops boosted morale among Union soldiers and civilians by demonstrating the reach and power of the Union army.
The capture of key Confederate cities like Atlanta and Savannah during the march further emphasized the Union's growing dominance, suggesting that the Confederacy was losing its ability to protect its own territory.