Final answer:
The Confederacy sought Indian support by offering various incentives, occupying Indian Territory forts, negotiating with the Five Civilized Tribes, and allowing them to send delegates to the Confederate Congress. Both the Americans and the British also sought alliances with Indian tribes during the war.
Step-by-step explanation:
The Confederacy actively sought Indian support by offering various incentives.
During the Civil War, the Confederacy occupied Indian Territory forts and negotiated with the Five Civilized Tribes, such as the Choctaws and Chickasaws, to support their cause. The CSA even allowed them to send delegates to the Confederate Congress. Some Native American slaveholders from these tribes saw common cause with white slaveholders and supported the Confederacy.
Additionally, both the Americans and the British sought alliances with Indian tribes during the war. The Iroquois Confederacy, a powerful Native American alliance, was one of the potential alliances both sides desired. The British hoped that supporting them would prevent further loss of land through American expansion.