James Thayer Vandeventer's 1910 obit states that he was appointed Major in the Federal army and raised to Col. It also says he was part of the honor guard for Lincoln's body.

I can't find him in the Soldiers and Sailors database even though I tried different variations of his name. The obit did not say what regiment or state where he enlisted. He died in Knoxville TN, but he moved there after the war.

Can someone help, please?