Background
Hermann Thomsen was born on 10 March 1867 in Flensburg which had recently been lost by the Kingdom of Denmark and incorporated into Prussia.
Hermann Thomsen was born on 10 March 1867 in Flensburg which had recently been lost by the Kingdom of Denmark and incorporated into Prussia.
Lieth-Thomsen joined the Prussian Army in 1887, serving first as a pioneer officer In January 1908 the German General Staff established a technical staff to monitor foreign and domestic progress in aviation, motorized transport and telegraphy. Captain Thomsen was appointed as its head, serving under Erich Ludendorff.
Thomsen served on the General Staff until February 1914 when he was transferred to the staff of the 2nd Railway Regiment.
However, he was soon transferred again and at the start of August Thomsen took up post as the Investigation Officer for Airship Guidance at Posen. In March 1915 von der Lieth-Thomsen was appointed Chief of Field Air Forces (Chef des Feldflugwesens) for the German Army.
At this stage he held the rank of Major which was far more junior than the rank of his opposite numbers in the Royal Flying Corps. The award was resented by some of his junior officers.
After the end of, Germany was required to disestablish her Air Services.
Lieth-Thomsen served in the Aviation Department of the Prussian War Ministry during January and February 1919 and was then assigned to other duties at the War Ministry. However, he resigned his position and retired from military service as a colonel in August 1919. In the 1920s Lieth-Thomsen actively participated in the German efforts to build a secret Air Force in the Soviet Union.
In 1923 he first made contact with the Soviets and in 1925 he was instrumental in establishing the German military mission in the Soviet Union.
During the 1920s he developed serious eye problems which eventually led to his blindness. In 1928 he moved back to the island of Sylt in his native Schleswig-Holstein.
Despite his blindness, when the Luftwaffe was established in 1935 under Hermann Göring, Lieth-Thomsen re-entered military service as Head of the Military Science at the Reich Air Ministry. He was granted the rank of major general.
He held this post until his death in 1942, receiving promotions to lieutenant general and General der Flieger before the outbreak of I. Hermann von der Lieth-Thomsen died on 5 May 1942 in Sylt and was buried in the Invalidenfriedhof Cemetery in Berlin.