
Flag of Organization X (Οργάνωση Χ)
Οργάνωσις Χ (Χ) was a Greek nationalist, royalist and strongly anti-communist organization founded in 1941 by Georgios Grivas during the German occupation of Greece. Initially presenting itself as a resistance organization, it focused increasingly on fighting the communist EAM/ELAS, particularly during the Dekemvriana of 1944, when Χ forces fought alongside British and government forces against EAM-ELAS. After the occupation, its members remained active in the anti-communist camp during the Greek Civil War, and the organization became associated with the broader postwar Greek right, monarchism and anti-communism. It was eventually dissolved in 1949, although former members remained influential in Greek political and military circles.