The Organization X was a paramilitary right-wing anti-communist royalist organization set up in 1941 during the Axis occupation of Greece.
Georgios Grivas
The Dekemvriana refers to a series of clashes fought during World War II in Athens from 3 December 1944 to 11 January 1945. The conflict was the culmination of months of tension between the left-wing EAM, some parts of its military arm, the ELAS, stationed in Athens, the KKE and the OPLA from one side and from the other side, the Greek Government, some parts of the Hellenic Royal Army, the Hellenic Gendarmerie, the Cities Police, the Organization X, among others and also the British Army.
A Sherman tank and troops from the 5th (Scottish) Parachute Battalion, British 2nd Parachute Brigade together with their Greek allies, fighting against members of ELAS in Athens, 18 December 1944.
A crowd in Syntagma Square celebrates their liberation from Axis powers and the coming of the Papandreou Government (18 October 1944).
Unarmed EAM protesters lying dead or wounded on 3 December 1944 in front of the Greek Parliament, while others are running for their lives; moments after the first shootings that left at least 28 dead and signalled the beginning of the Dekemvriana events.
ELAS issued pamphlet calling workers from different neighbours of Athens to fight against the Greek Government and their British allies (17 December)