In 1812, during the War of the Sixth Coalition, Glebov served in the Second Western Army, participating in Pyotr Bagrations retreat from Volkovisk. As the Russians subsequently made their counterattack, they managed to push the French outposts back, reaching the bridge at Saltanovka (present-day Mogilev) at 08:00 AM. Glebov subsequently played an important role at the heavy fighting at Saltanovka, where the Jager corps he led managed to overrun the defenders who were stationed on the bridge, thus enabling the Russian advance. Following the battle at Moghilev, the 2nd Western Army, which Glebov was part of, completed the construction of a bridge at Novy Bukhov, which they used to cross the river, and then continued marching towards Smolensk. Glebov subsequently participated at Smolensk, Shevardino, and the infamous Battle of Borodino, in which he was wounded in the head. After having recovered from his wounds, he took part at Maloyaroslavets and Krasnyi; for the latter he was awarded the Order of St.Vladimir, 3rd class. In 1813 he once again fought at numerous fronts and battles, which comprised Lützen, Bautzen, Modlin, Dresden, Leipzig (awarded Order of St. George (3rd class) and lastly at the siege of Hamburg. In his last years of active service, he once again distinguished himself at Soissons, Craonne, and Laon. Prof. Alexander Mikaberidze adds that regarding the 6th Jager Regiment, of which he was a part of for a long time, he became chef on 12 May 1814, and served up to 1815 as an assistant to the military commander of the 6th division. His last military act was that of taking command of the 1st brigade of the 12th division on 20 March 1816, shortly he retired from military service on 23 September 1816, at the age of 46, after being discharged and being ordered to move to another regiment.