King Constantine II's dismissal of George Papandreou's centrist government in July 1965 prompted a prolonged period of political turbulence, which culminated in a coup d'état on 21 April 1967 by the Regime of the Colonels. Under the junta, civil rights were suspended, political repression was intensified, and human rights abuses, including state-sanctioned torture, were rampant. Economic growth remained rapid before plateauing in 1972. The brutal suppression of the Athens Polytechnic uprising on 17 November 1973 set in motion the events that caused the fall of the Papadopoulos regime, resulting in a counter-coup which overthrew Georgios Papadopoulos and established brigadier Dimitrios Ioannidis as the new junta strongman. On 20 July 1974, Turkey invaded the island of Cyprus in response to a Greek-backed Cypriot coup, triggering a political crisis in Greece that led to the regime's collapse and the restoration of democracy through Metapolitefsi.