Back to the topic and the definition suggested by GrauGeist "Determined to succeed in spite of the odds".
Eastern Front, VVS. Summer 1941: Bomber crew going to the afternoon raid after half of the squadron is shot down in the morning. Summer 1942: Fighter pilot on the Khersones airfield in Sevastopol taking off and landing under German artillery fire and with Bf 109s in the air.
Easter Front, Luftwaffe. 1945. Probably most of the pilots who continued to fly in Koenigsberg and Courland Pocket. Certainly, those who participated in the evacuation from the Courland on May 8th.
Eastern Front, VVS. Summer 1941: Bomber crew going to the afternoon raid after half of the squadron is shot down in the morning. Summer 1942: Fighter pilot on the Khersones airfield in Sevastopol taking off and landing under German artillery fire and with Bf 109s in the air.
Easter Front, Luftwaffe. 1945. Probably most of the pilots who continued to fly in Koenigsberg and Courland Pocket. Certainly, those who participated in the evacuation from the Courland on May 8th.