In the War of Austrian Succession, Prittwitz remained with Dragoon Regiment Nr. 4 and participated in all the major battles: in particular, he distinguished himself at the Battle of Hohenfriedberg on 7 June 1745. On 4 April 1746, he was promoted to the Fähnrich and was stationed in garrison in Schwedt. On 8 May 1751, he became a second lieutenant. During the Seven Years' War, he was at the Battle of Kolin on 18 June 1757 and the Battle of Zorndorf on 25 August 1758, after which he was honored with the Order Pour le Mérite. Short of cash, though, in 1758 he asked his king for money in a long poem, and he answered:" "Wer dieses so artig in Verse gebracht, dem werden 500 Dukaten vermacht. – Ich bin Euer wohlaffectionirter König Friedrich." "(He who has expressed himself so well in this verse will be left with 500 ducats. I am your well-disposed King Frederick."