Amongst his teachers were August Fischer in Arabic and Heinrich Zimmern in Assyriology.

In 1914, Landsberger joined the Austro-Hungarian Army, where he fought with distinction on the Eastern Front, winning a golden Distinguished Service Cross.

Landsberger was dismissed as a result of the Nazi-era Law for the Restoration of the Professional Civil Service which excluded Jews from government employment.

Landsberger accepted a post at the new Turkish University of Ankara, working especially in the area of languages, history and geography.

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