In November 1973 an uprising began against the military junta in Greece at the Athens Polytech. The military junta brutally suppressed the uprising. The brutality of the suppression ended up being the undoing of the regime as the people turned against it. Exiled politician Konstantinos Karamanlis returned in July 1974and became the interim Prime Minister thus ending the military rule. Later that year a referendum was held ended the monarchy and establishing a constitutional government in Greece.