Georgios Papadopoulos

He joined the Hellenic Army during the Second World War and initially helped resist the Italian invasion of Greece in the Greco-Italian War. He is widely believed to have later collaborated as a member of the Axis-aligned Security Battalions. After the war, he rose to the rank of colonel in the army.
In April 1967, Papadopoulos and a group of other mid-level army officers overthrew the democratic government and established a military junta that lasted until 1974. Assuming dictatorial powers, he led an authoritarian, anti-communist and ultranationalist regime which eventually ended the Greek monarchy and established a republic, with himself as president. In 1973, he was overthrown and arrested by his co-conspirator Brigadier General Dimitrios Ioannidis. After the ''Metapolitefsi'' which restored democracy in 1974, Papadopoulos was tried for his part in the crimes of the junta and sentenced to death, but his sentence was commuted to life imprisonment. Refusing several offers of clemency in exchange for admitting guilt for the crimes of the junta, he spent the remainder of his life in prison. Provided by Wikipedia