Treaty of Hopewell, Nov. 28, 1785
Treaty of Holston, July 2, 1791
Treaty of Philadelphia, Feb. 17, 1792
Treaty of Philadelphia, June 26, 1794
Treaty of Tellico, Oct. 24, 1804
Treaty of Tellico. Oct. 25, 1805
Treaty of Tellico, Oct. 27, 1805
Treaty of Washington, Mar. 22, 1816
Treaty of Chickasaw Council House, Sept. 14, 1816
Treaty of Cherokee Agency, July 8, 1817
Treaty of Washington. Feb. 27, 1819
Treaty of Washington, May 6, 1828
Treaty of Washington, Mar. 14, 1835
Treaty of New Echota, Dec. 29, 1835
Yes, they were before the pretended rebellion. NO, the United States was not a party to the exchange of Southern masters for Northern. One party to a contract can not make unilateral changes. Southern States couldn't unilaterally leave the perpetual Union, nor could they unilaterally change the terms, nor unilaterally break a treaty negotiated with the Union and the Cherokees.
Unless you think I can sell Stand Watie's house to you, for what ever price I care to sell it, without bothering to ask him for permission.
Tell that to the Indians.
The United States solemnly guarantee to the Cherokee nation, all their lands not hereby ceded. [1791]