 Complete the following phrase:  In the years 17581759, campaigning in two theaters, Saxony and Upper Pomerania, some distant from one another, damaged his health. In April 1759, Frederick recalled him to Berlin to recover, writing that Dohna was too sick to continue:  Vous êtes trop malade pour vous charger du commandement. Vous ferez bien de vous faire transporter ou à Berlin ou dans un endroit où vous pourrez remettre votre santé. You are too sick to lead your troops; bring yourself to Berlin where you can recover your health. He was replaced by General Heinrich von Manteuffel. After his recovery, he rejoined the army at Landsberg on the Warthe. On 24 June 1759 he marched with Manteuffel into Poland in their unsuccessful effort to prevent the Russians from advancing into Silesia. On 22 July 1759, he opposed the Russian army at Züllichau, but he again was recalled to Berlin for health reasons before the armies could engage. Carl Heinrich von Wedel, his successor at Züllichau, engaged the Russian army at the 