The two battles that had significant impacts on Confederate supply lines were:
B. The Battle of Atlanta significantly affected Confederate supply lines because Union forces destroyed a major transportation and railway hub in the South.
D. The Battle of Vicksburg significantly affected Confederate supply lines because Union forces took control of an important strategic location on the Mississippi River.
Explanation:
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Battle of Atlanta: Atlanta was a crucial supply and transportation hub for the Confederacy. The Union's capture and subsequent destruction of key railroads and infrastructure in Atlanta significantly impaired the Confederacy's ability to move troops and supplies efficiently across the South.
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Battle of Vicksburg: The capture of Vicksburg gave Union forces control over the Mississippi River, which was vital for transporting goods and supplies. This effectively split the Confederacy in two and severely restricted the movement of supplies from the western Confederate states to those in the east.
Both battles were critical in undermining the logistical capabilities of the Confederate forces throughout the Civil War.