The Gertrude or Gertrud was the code name of the joint invasion plan for

Turkey Turkey ( tr, Türkiye ), officially the Republic of Türkiye ( tr, Türkiye Cumhuriyeti, links=no ), is a transcontinental country located mainly on the Anatolian Peninsula in Western Asia, with a small portion on the Balkan Peninsula in ...

Nazi Germany Nazi Germany (lit. "National Socialist State"), ' (lit. "Nazi State") for short; also ' (lit. "National Socialist Germany") (officially known as the German Reich from 1933 until 1943, and the Greater German Reich from 1943 to 1945) was ...

and

Kingdom of Bulgaria The Tsardom of Bulgaria ( bg, Царство България, translit=Tsarstvo Balgariya), also referred to as the Third Bulgarian Tsardom ( bg, Трето Българско Царство, translit=Treto Balgarsko Tsarstvo, links=no), someti ...

, the idea began forming in the beginning of the summer of 1942. This code name was eventually changed. The project was abandoned because of the rapid advance of the

Red Army The Workers' and Peasants' Red Army ( Russian: Рабо́че-крестья́нская Кра́сная армия),) often shortened to the Red Army, was the army and air force of the Russian Soviet Federative Socialist Republic and, afte ...

in the

Caucasus region The Caucasus () or Caucasia (), is a region between the Black Sea and the Caspian Sea, mainly comprising Armenia, Azerbaijan, Georgia, and parts of Southern Russia. The Caucasus Mountains, including the Greater Caucasus range, have historically ...

, and the

Allied invasion of Sicily The Allied invasion of Sicily, also known as Operation Husky, was a major campaign of World War II in which the Allied forces invaded the island of Sicily in July 1943 and took it from the Axis powers ( Fascist Italy and Nazi Germany). It b ...

.''Forgotten Legion: Sonderverbände Bergmann in World War II, 1941–1945'' by Eduard Abramian.

References

Turkey in World War II Cancelled military operations involving Germany Cancelled invasions Cancelled military operations of World War II Germany–Turkey relations Bulgaria–Germany relations Bulgaria–Turkey relations {{WWII-stub