Decembrist revolt
In 1823 Langeron was relieved of these duties because of poor health, and he then traveled to France until 1825. After the Decembrist revolt, Langeron was appointed a member of the sentencing panel. Called up with the start of the Russo-Turkish War, 1828-1829 he fought against the Turks in a number of battles until he was replaced by Hans Karl von Diebitsch. Langeron died during a cholera epidemic in 1831.