In 1941 Kharchenko became underleitenant and a platoon commander in the 22 Detached Engineering and anti-gas battalion of Local Anti-Aircraft Defence troops. In 1942 he came back to the unit where he had served in non-commitioned positions -- to the 6th Engineering and anti-gas regiment of the NKVD antiaircraft defense troops. He helped to defuse more than 26,000 German shells, mines and bombs during the Battle of Stalingrad and the Battle of Kiev (1943). On 2 November 1944, he was awarded the title Hero of the Soviet Union and the Order of Lenin for his actions in defusing unexploded ordnance and mines.