Answer :
Final answer:
The Honey Springs battle was the key turning point that signaled the decline of Confederate control in the Indian Territory during the Civil War.
Explanation:
The battle that marked the beginning of the end of Confederate control of the Indian Territory was the Honey Springs battle. This crucial battle, fought on July 17, 1863, in what is now Oklahoma, was a turning point in the region's control during the Civil War. Union forces, led by General James Blunt, decisively defeated Confederate troops under General Douglas Cooper, significantly weakening Confederate influence in the area.
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