In September 1922, Grobba joined the legal affairs department of the
German Foreign Ministry of the
Weimar Republic. In January 1923, he was transferred to Department 3 (
Abteilung III), the department responsible for the
Middle East. In October 1923, when postwar diplomatic relations were established between Weimar Germany and the
Emirate of Afghanistan, Grobba was named Germany's representative in
Kabul, with the rank of consul. In 1925, when the government of
Emir Amanullah Khan accused him of attempting to help a visiting German geographer escape from Afghanistan shortly after the geographer shot and killed an Afghan citizen near Kabul, Grobba denied the charge. There was a diplomatic crisis between Germany and Afghanistan over the role of Grobba. In April 1926, Grobba was recalled to
Berlin. From 1926 to 1932, Grobba served again in
Abteilung III. He was now in charge of the section responsible for
Iran, Afghanistan and
British India.
Ambassador to Iraq and Saudi Arabia From October 1932, he was appointed as the German
ambassador to the
Kingdom of Iraq and was sent to
Baghdad. Grobba was able to speak both
Turkish and
Arabic. He frequently spoke of
Arab nationalism and of ousting the
British from the Middle East. Grobba purchased a
Christian-owned newspaper, "The Arab World" (''al-'Alam al-'Arabi''). He serialised an Arabic version of
Adolf Hitler's
Mein Kampf, and soon,
Radio Berlin began to broadcast in Arabic. On 30 January 1933, Hitler became the
chancellor. By the death of
President Paul von Hindenburg on 2 August 1934, Hitler and his
National Socialist German Workers Party were in full control over Germany. After the death of
King Faisal I on 8 September 1933, Grobba convinced King
Ghazi to send a group of Iraqi military officers to Germany for a
military simulation. The officers returned home amazed. Grobba also convinced Ghazi to allow Germany to send 50 German officers to Iraq for war games. Ghazi was convinced to accept German "research expeditions" to Iraq. Unlike the Iraqis, the Germans did not return home but stayed in Iraq for the long term. Grobba enthusiastically supported a virulently anti-imperialist group of Iraqi officers, the "Circle of Seven". Its four leading officers were nicknamed the "
Golden Square". They would represent real power, as successive Iraqi governments sought the support of the military for survival. They had long looked to Germany to support them, which Grobba enthusiastically encouraged. In 1938, a main British pipeline in Iraq was attacked and set on fire by Arabs. When the attack was claimed to be connected to Grobba, he was forced to flee. Grobba fled to the court of
King Ibn Saud of
Saudi Arabia. Since 1937, Ibn Saud was reported to be "on the outs" with the British, and, in 1939, his emissary was reported to be seeking arms in Germany. From November 1938 to September 1939, Grobba was also the German Ambassador to the Kingdom of Saudi Arabia. ==Beginning of World War II==