After
World War II, Lambrakis completed his medical studies and worked as a lecturer in the Department of
gynaecology. He continued to help the poor by running a small private clinic for patients who were unable to afford medical care. While not a
Communist, Lambrakis' political and ideological orientation leaned towards the left. He was actively involved in the
pacifist movement of his time, which voiced strong opposition to the
First Indochina War and the
Second American War in Vietnam. Lambrakis acted politically from within the
United Democratic Left (''
, ΕΔΑ
/Eniéa Dimokratikí Aristerá
, EDA''), the only legal left-wing political party in the country after the
Greek Civil War of 1946–1949 and until the fall of the
Greek military junta of 1967-1974. He was elected to the
Hellenic Parliament in the
1961 Greek legislative election as a
Piraeus MP. That same year (1961), under his initiative, the was established in Greece. In his capacity as Vice President of EDYE, Lambrakis participated in international pacifist meetings and demonstrations despite frequent threats against his life. EDYE was an organization set up by EDA which while not officially aligned to the
World Council of Peace broadly supported its anti-capitalist and anti-imperialist position. EDA had ceded Lambrakis full freedom to represent the Commission and he soon emerged as its most articulate and determined leader. On , the pacifist movement in Greece organized the First Pacifist Rally from
Marathon to
Athens. The police intervened, banned the rally and arrested many demonstrators (
Mikis Theodorakis among them). Lambrakis, protected by his parliamentary immunity, marched alone and arrived at the end of the rally holding the banner with the peace symbol (photo), the one that he had previously held up during the
Aldermaston rally in the
United Kingdom while he was protesting near the
Atomic Weapons Research Establishment (AWRE). Soon afterward, he too was arrested by the police. ==Assassination==