Greek People's Liberation Army
Athanasios Klaras (; August 27, 1905 – June 15, 1945), better known by the "nom de guerre" Aris Velouchiotis (), was a Greek journalist, politician, member of the Communist Party of Greece, the most prominent leader and chief instigator of the Greek People's Liberation Army (ELAS) and the military branch of the National Liberation Front (EAM), which was the major resistance organization in occupied Greece from 1942 to 1945.