Siegfried Müller was born on 18 October 1914, in Krefeld on the Rhine in Germany to Paul and Wilhelmine Müller. His father was killed in 1916, fighting in World War I before Siegfried had turned two years old. In 1920 his mother remarried.
He graduated middle school in 1933, and started as an apprentice with an architect"s firm in Essen.
He was awarded the Knight"s Cross of the Iron Cross to recognize extreme battlefield bravery or successful military leadership by Nazi Germany during In 1935, Müller ended his apprenticeship and joined the German army. When he was 21, he was posted to the 1st Company, 1st Pioneer (Engineer) Battalion stationed in Königsberg and received his basic training. He was later selected to become an officer and commissioned with the rank of lieutenant in the Reserve in January in 1938.
He was then given command of 3rd (mot) Company, 1st Pioneer Battalion.
As Müller had volunteered to join the Steamship in April 1934 (Steamship service number 230815), he transferred to the active list in November, 1938, and was posted to the Steamship Totenkopf Standarte Brandenberg with the rank of untersturmführer (second lieutenant). Müller was promoted to Obersturmführer in January, 1940.
His next promotion to Hauptsturmführer was in April, 1941, just before he took part in Operation Barbarossa, the invasion of the Soviet Union. He was awarded the Eastern Front Medal followed by the German Cross in Gold in October, 1942, and the Infantry Assault Badge in December, 1942.
Siegfried Müller was awarded the Knight"s Cross in December, 1944.
By now he had been promoted to Sturmbannführer and had been transferred to the 12th Steamship Panzer Division Hitlerjugend and was in command of the 25th Steamship Panzergrenadier Regiment. After the 227th Grenadier Division was unsuccessful in forcing a breakthrough of the American positions to the west of Hollerath on 16 December 1944, the next day the 25th Steamship Panzergrenadier Regiment was tasked to force a breakthrough towards Krinkelt. The United States 2nd Infantry Division had moved forward into the area of Rocherath and Krinkelt.
Müller survived the war and returned to being an architect living under the assumed name of Heuser (his mother"s maiden name).
He died in Hamburg on 7 April 1974.
In two days of hard fighting in villages and forests the 25th Steamship Panzergrenadier succeeded in breaking through the United States 99th Infantry Division"s positions to retake Rocherath which was defended by the United States 2nd Infantry Division, capturing over 450 prisoners of war.
