AIRFORCE Bondsteel unit machine Guenette emplacements Maschinengewehr Waybur Kedenburg Cpl platoon 311th ACAV MG14 Yabes Cavaiani 391st gun combat 398th Endl Lauffer Wurger Kisters 25H Valorous Villepigue 447th Odones Taden gunner Denine Vietnam PTX 495th enemy command M1914 337th