Turkey had by now readied its fleet and its fighter jets appeared over Nicosia. Turkey was dissuaded from direct involvement by the creation of a United Nations Peacekeeping Force in Cyprus (UNFICYP) in 1964. Despite the negotiated ceasefire in Nicosia, attacks on the Turkish Cypriot persisted, particularly in Limassol. Concerned about the possibility of a Turkish invasion, Makarios undertook the creation of a Greek Cypriot conscript-based army called the “National Guard”. A general from Greece took charge of the army, whilst a further 20,000 well-equipped officers and men were smuggled from Greece into Cyprus. Turkey threatened to intervene once more, but was prevented by a strongly worded letter from the American President Lyndon B. Johnson, anxious to avoid a conflict between NATO allies Greece and Turkey at the height of the Cold War.