After participating with the United Nations forces in the Korean War, Turkey joined NATO in 1952, becoming a bulwark against Soviet expansion into the Mediterranean. Following a decade of intercommunal violence on the island of Cyprus and the Greek military coup of July 1974, overthrowing President Makarios and installing Nikos Sampson as a dictator, Turkey invaded the Republic of Cyprus in 1974. Nine years later the Turkish Republic of Northern Cyprus (TRNC) was established. Turkey is the only country that recognises the TRNC