Whakaotihia te rerenga e whai ake nei: I whakahau a Fiebig i te KG4 i te Pakanga o Belgium, te Pakanga o France, me te Pakanga o Ingarangi. I te 8 o Mei 1940, i whakawhiwhia ki a ia te Cross Knight o te Iron Cross. I te Paenga-whāwhā o te tau 1941, i arahina e ia te KG4 i te wā o te whakaekenga a te Tiamana o te Axis o Yugoslavia tae atu ki te
te whakaekenga o Belgrade.