Frizzell was captured by the Confederacy that day. A week later he was released by the Confederacy in a prisoner exchange and spent the next two months in a hospital in Memphis, Tennessee. Later in 1863, his unit joined the ranks of General William Tecumseh Sherman and fought in the Battle of Lookout Mountain near Chattanooga. After re-enlisting in January 1864, Frizzell and the 6th Missouri infantry joined General Sherman on his march through Georgia. Frizzell was shot in the left knee on May 14, 1864, at the Battle of Resaca, Georgia. He continued fighting until Lynch Creek, North Carolina, where the Confederates again captured him on March 1, 1865. After escaping, he heard the war was over and, in his own words, "he started working his way back to Madison County as best he could."