Dossow remained in Wesel to protect the city during the First and Second Silesian Wars. In 1742 he formally became Governor of Wesel and was awarded the Order of the Black Eagle. After the Battle of Hohenfriedberg, Frederick promoted Dossow to "Generalfeldmarschal" on 20 July 1745. As a special recognition for Dossow's service, in 1751 Frederick the Great awarded him a diamond-covered portrait of the king on a blue band. Dossow, Wilhelm Dietrich von Buddenbrock, and Hans von Lehwaldt were the only recipients of the special award.