After participating in various other conflicts for the Soviet Union, Zalka moved to Spain and fought in the Spanish Civil War as a general for the International Brigades.

Zalka formed an international group of Red Guards in Khabarovsk in February 1918 during the Russian Civil War and fought against the White formations in Siberia.

[1] At the end of World War I, Zalka chose to stay in Russia instead of returning to Hungary, where he met his future wife, Vera.

Zalka moved to Spain in 1936 and joined the International Brigades to fight in the Spanish Civil War in November of that year.

He was able to carry Zalka's remains to Hungary, where they were buried in the Kerepesi Cemetery in Budapest along with other high-ranking Hungarian military officers.