Georgios Papadopoulos, head of the military Regime of the Colonels in Greece, is ousted in a hardliners' coup led by Brigadier General Dimitrios Ioannidis.

Georgios Papadopoulos was a Greek military officer and dictator who led a coup d'etat in Greece in 1967 and became the country's Prime Minister from 1967 to 1973. He also was the President of Greece under the junta in 1973, following a referendum. However, after causing a massacre by deploying military riflemen and a tank brigade to attack non-violent protestors to suppress the Athens Polytechnic uprising, he was, in turn, overthrown by hardliner Dimitrios Ioannidis, in a string of events that would culminate in the fall of the regime in 1974. His and the dictatorship's legacy, as well as its methods he constructed and effects on Greek economy and society as a whole, are still fiercely debated.

The Greek junta or Regime of the Colonels was a right-wing military junta that ruled Greece from 1967 to 1974. On 21 April 1967, a group of colonels overthrew the caretaker government a month before scheduled elections which Georgios Papandreou's Centre Union was favoured to win.

Dimitrios Ioannidis, also known as Dimitris Ioannidis and as The Invisible Dictator, was a Greek military officer and one of the leading figures in the junta that ruled the country from 1967 to 1974. Ioannidis was considered a "purist and a moralist, a type of Greek Gaddafi".