Osman Kasayev was born on 11 October, 1916 in Khurzuk aul (now
Karachaevsky District of
Karachay-Cherkess Republic). By nationality -
Karachay. In 1931 he ended primary school, in 1936 - rafbak. In 1937 Kasayev was drafted into the Red Army. Was studying in cavalry military academy, but has been reassigned to Kyiv Artillery school. Participated in
Soviet invasion of Poland. Since the outbreak of Great Patriotic War fought on the front. Shortly after the war began
121st Rifle Division, in which Kasayev fought was encircled and defeated. In the late August of 1941, upon reaching
Byalynichy district of
Mogilev region,
Byelorussian SSR, a group of fighters and commanders, including Kasayev, decided to start combat operations as partisans. Initially Kasayev was elected as political commissar, and later as a leader of partisans detachment, which was assigned the number 121. Detachment was successfully fighting in Mogilev region, destroying garrisons, punitive units, warehouses, motor depots, and headquarters. At the end of 1943 detachment had over 1200 partisans, then it was transformed into 121st Partisan Regiment, commander of which Kasayev became. At the end of February 1944 regiment had fought in over 70 battles, defeated over 1000 enemy soldiers and officers, blew up 33 German echelons. On 17 February of 1944, during the transition between settlements in Byerazino district (Minsk region, BSSR) the partisan column was attacked by the German air force. ==References==