Tuhia he tomokanga mō tēnei whitiāhua - Ko ngā hōia mai i ngā rohe rerekē o te Elector Frederick William i noho i roto i ngā whakahau motuhake. I te tau 1651, i whakawhiwhia e te pooti pooti ki a Sparr te whakahau mo nga hoia hoia katoa i waho o Brandenburg me te Duchy o Prussia; ko te whakahau mo nga hoia katoa o Brandenburg-Prussia i whai mai i te tau 1655. I mahi a Sparr hei Tumuaki o nga Kaimahi a Frederick William i te wa i arahihia e te pooti nga ope, penei i te pakanga o Warsaw i te 1656
He aha? I te ra whakamutunga o te pakanga, "Generalfeldzeugmeister" (Master of Ordnance) von Sparr i arahi i te whakaeke angitu a Brandenburg ki nga ope Polani. I whakatairangahia ia hei Field Marshal i te tau 1657.