The two battles that had significant impacts on Confederate supply lines are:
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The Battle of Atlanta: This battle was crucial because Union forces captured the city of Atlanta, which was a major transportation and railway hub for the Confederacy. The loss of Atlanta disrupted Confederate supply lines significantly, hindering their ability to transport troops and goods necessary for the war effort.
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The Battle of Vicksburg: This battle was significant as well because it resulted in Union forces securing control of Vicksburg, a key strategic location on the Mississippi River. This not only split the Confederacy in two but also cut off a vital supply route for the Confederate army, severely impacting their ability to move supplies along the river.
Both battles effectively crippled the Confederate supply lines and contributed to the eventual defeat of the Confederacy in the Civil War.