Julius Hanau was born in South Africa, the son of Carl Hanau and Sophie Baumann. He grew up in a Jewish family and later married Violet Sybil, with whom he lived in Westminster, London. He served in the British Army during the First World War. He distinguished himself in the field, earning a Mention in Despatches, and by 1918 he was appointed deputy to the Chief of the British Mission to Yugoslavia.
After the war, Hanau remained in Belgrade, where he built a successful business career. His long residence in Yugoslavia gave him an intimate knowledge of the Balkans, its politics, and its waterways, particularly the Danube. When Europe slid back toward conflict in the late 1930s, the British War Office’s Section D—the forerunner of the Special Operations Executive—recruited him for his regional expertise. His principal mission was to prepare sabotage operations against Germany’s supply lines, most notably an ambitious plan to block the Danube at the Iron Gates gorge, thereby cutting off the flow of oil and raw materials from Romania to the Reich. Several attempts were made, but German counterintelligence became aware of his activities, and under pressure from Berlin the Yugoslav authorities expelled him in June 1940.
Hanau’s expulsion did not end his service. He was absorbed into the Special Operations Executive, where his knowledge of the Balkans and Africa proved invaluable. By 1941 he was running SOE’s West African desk in Cairo, coordinating clandestine operations and logistics across a vast region. The following year he played a significant role in supporting the British assault on Madagascar, an operation designed to prevent the island from falling under Axis control. For his contribution he was appointed an Officer of the Order of the British Empire. By this stage he had reached the rank of colonel.
He died in Cairo in May 1943, reportedly of natural causes, and was buried in the Heliopolis War Cemetery. He was fifty‑eight years old.
Promotions:
28 September 1916: Temporary 2nd Lieutenant (on prob.)
29 March 1918: Temporary Lieutenant
26 February 1919: Temporary Major
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