Born in Zagreb to a family of Jewish origin, despite that Sachs-Petrović publicly argued that "Jews are not a nation, but Croats of Moses' faith".
[1] The organisation aimed at destruction of the KSCS was led by Ivo Frank and, at the time, included Generaloberst Stjepan Sarkotić, Lieutenant Colonel Stephan Duić [de], Emanuel Gagliardi, Niko Petričević, Vilim Stipetić, and Beno Klobučarić.
[3] Sachs-Petrović, along with Frank, was the co-signatory of an agreement with Gabriele D'Annunzio, offering to turn over territory along Dalmatian coast of the Adriatic Sea to Italy in return for assistance in seizing power in Croatia.
[5] In 1924, Sachs-Petrović and Frank signed the Balkan Federation agreement with representatives of the Internal Macedonian Revolutionary Organization, Montenegrin and Kosovo rebels in Vienna.
Following Axis Invasion of Yugoslavia in April 1941, and establishment of the puppet Independent State of Croatia, Sachs-Petrović requested the authorities to exempt him and his wife Elza from wearing the yellow badge on account of his prior work for the Croatian cause.