The image below refers to a place called Stolgen. My copy of the Freytag & Berndt map of Eastern Europe does not depict Stolgen, which suggests that it is quite small. It is, however, capable of being acquired on the internet. Using the two references together, Stolgen appears to be located in what is now northeastern Poland, perhaps hear highway 16, in the vicinity of Kisielice and Ilawa. At the beginning of Operation Barbarossa, this area would have been under Soviet control.
General of Panzer Troops Joachim Hermann August Lemelsen commanded 1st Army during May, 1944. He had previously led 47th Army Corps (mot.)/47th Panzer Corps for three years, from its formation until October, 1943. General Lemelsen was another of Germany’s outstanding panzer officers, earning the Panzer Assault Badge in Silver, the German Cross in Gold, the Knight’s Cross of the Iron Cross and the Oakleaves, all while leading the 47th Panzer Corps. General Lemelsen became a member of the General Staff during the First World War, and during the interwar period was an artillery instructor, commander of the Infantry School at Dresden, and commander of the War School at Dresden as well. During the Second World War, General Lemelsen led the 29th Infantry Division (mot.) and the 5th Panzer Division, as well as 10th Army, 6th Army, and 14th Army.