|German Ambassador to Croatia|
15 April 1941 – 8 May 1945
|Preceded by||Office established|
|Succeeded by||Office abolished|
|Member of Reichstag|
18 June 1903|
Strausberg, Berlin, German Empire
|Died||7 June 1947
Zagreb, Croatia, FPR Yugoslavia
|Political party||Nazi Party|
|Alma mater||Potsdam Military Academy|
|Service/branch||German Imperial Army (1920)
|Years of service||1920, 1926-1945|
|Battles/wars||World War II in Yugoslavia|
Kasche was born in Strausberg. After attending cadet school in Potsdam and the Lichterfelde military academy, he spent 1919-1920 in the Freikorps in Berlin and the Baltic states. He joined the Sturmabteilung in 1925 and the Nazi party in 1926. He was also a leader of the SA in Pommerania. From 1928 to 1931 Kasche was deputy Gauleiter in Ostmark, and in September 1930 was elected to the Reichstag. In 1934, Kasche was promoted to SA-Obergruppenführer, a rank equal to a lieutenant general in the Wehrmacht. Kasche was one of the few SA general officers to survive the Night of the Long Knives.
Ambassador to Croatia
In April 1941, Kasche was assigned to the Foreign Ministry for diplomatic service. On 15 April 1941, when Germany recognized the Independent State of Croatia, Kasche was named ambassador. He arrived in Zagreb on 20 April. In the Independent State of Croatia, Kasche advocated joint effort of the Axis forces against the Yugoslav Partisans. Since he was very affectionate to Ante Pavelić and "Ustaše revolution", he justified policy and actions of Ustaše and Hitler called him "greater Croat then Pavelić".
Kasche was in constant conflict with Edmund Glaise-Horstenau, a Plenipotentiary General in the Independent State of Croatia. After the unsuccessful Lorković-Vokić plot, an attempt to align the Independent State of Croatia to the Allies, Kasche finally found a chance to denigrate Horstenau and make him withdraw from Croatia, as he was involved in the plot. At a meeting of the Nazi leadership on 16 July he was designated as the future Reichskommissar of the planned Nazi colony called Moskau, which was to comprise the main territories of central and northern Russia up to the Ural mountains. Military realities on the Eastern Front during the 1941-1942 winter prevented its establishment, leaving the project in the planning stages.
During World War II, many Serbs were deported from Croatia—some to Serbia and others to Germany. The order to deport Serbs did not originate with the Croatian government. According to the Nuremberg Tribunal, a conference was held in the German Legation presided over by Siegfried Kasche, "at which it was decided forcibly to evacuate the Slovenes to Croatia and Serbia and the Serbs from Croatia into Serbia. This decision results from a telegram from the Ministry of Foreign Affairs, Number 389, dated 31 May 1941".
He reported to Berlin on April 18, 1944 that "Croatia is one of the countries in which the Jewish problem has been solved".
After the war, Kasche was returned to Yugoslavia by the Allies. He was tried by the Supreme Court of the Federal People's Republic of Yugoslavia in May 1947, convicted, and executed by hanging on June 7, 1947.
- Jacobsen 1961, p. 4.
- Dizdar et al. 1997, p. 183.
- Brissaud et al. 1977, p. 334.
- Kay 2006, p. 182.
- Secretariat of the Tribunal, Trial of the Major War Criminals, Nuremberg: International Military Tribunal: 1947: Vol. I, p. 433; See http://www.mcadams-croatia.net/wp_on_a_artukovic.htm.
-  at www.porges.net
- Collaborators Trial
- Brissaud, André; Mabire, Jean; Odić, Slavko F.; Komarica, Slavko (1977). Noć i magla: Gestapo u Jugoslaviji (in Croatian). Centar za informacije i publicitet.
- Dizdar, Zdravko; Grčić, Marko; Ravlić, Slaven; Stuparić, Darko (1997). Tko je tko u NDH (in Croatian). Minerva. ISBN 9536377039.
- Jacobsen, Hans Adolf (1961). Ausgewählte Dokumente zur Geschichte des Nationalsozialismus, 1933-1945 (in German). Verlag Neue Gesellschaft.
- Kay, Alex J. (2006). Exploitation, Resettlement, Mass Murder: Political and Economic Planning for German Occupation Policy in the Soviet Union, 1940-1941. Berghahn Books.
- Ernst Klee: Das Personenlexikon zum Dritten Reich. (The Encyclopedia of People of the Third Reich) Revised edition, Frankfurt am Main, 2003, ISBN 3-10-039309-0, p 299
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