Career
The Knight"s Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership. Gapp died in September 2015 at the age of 96. Gapp completed 400 missions in the Ju-88 fighter-bomber in IV./LG-1, III./Knight of the Order of the Garter (J)-6 and ended up flying the Maine-262, scoring several aerial victories over B-24s and downed one P-38 Lightning.