In 1865, Jumper was ordained as a Baptist minister. He was the pastor of the Spring Baptist Church in the Seminole Nation, near the town of Sasakwa.
John Jumper led these troops in the battles of Round Mountain, Chusto-Talasah, Middle Boggy, and Second Cabin Creek. The United States ordered the Seminoles to sign a new peace treaty after the war because of their allegiance with the Confederacy. They were expected to release their slaves and provide full citizenship to any freedmen who wished to remain in Indian Territory.