Dokashenko was born on 21 November 1921 to a Ukrainian family in the village of
Kindrativka, now part of
Sumy Raion,
Sumy Oblast,
Ukraine. In 1939, he completed his ninth grade and studied at a local aeroclub. Just a few days before the start of Operation Barbarossa, he entered the military, but did not see combat in World War II until June 1944; he graduated from the Chuhuiv Military Aviation School of Pilots in 1943 and was initially assigned to the 22nd Reserve Aviation Regiment. Eventually, he was transferred to the 17th Fighter Aviation Regiment, with which he flew for the remainder of the war. While on the eastern front he flew 113 sorties on the P-39 and gained two aerial victories, and after the capitulation of Nazi Germany, his regiment was transferred to the Far East, ,where he flew just three sorties on the P-63 during the short war with Japan. After the war, he was promoted to flight commander and became a member of the Communist Party in 1947. ==Korean War==