Whakaotihia te rerenga e whai ake nei: I te tau 1671 ka noho a Frederick Louis hei kornet i roto i te ope hoia o von Eller i roto i te ope o Brandenburg-Prussia. I te tau 1675 i uru ia ki te
Te Pakanga o Fehrbellin hei Rittmeister. I te tau e whai ake nei, ko ia he koroneela i roto i nga toa o Holstein. I whakaingoatia a Frederick Louis hei rangatira rangatira me te Kawana o Wesel i te tau 1690. E toru tau i muri mai ka tohua ia hei rangatira rangatira mo te Duchy o Prussia.