Army General Augusto Pinochet took power on 11 September 1973 in a "coup d'état" which deposed the democratically elected Socialist President Salvador Allende. This coup was also backed by the United States. Allende killed himself as the presidential palace was being bombarded. A military junta — led by Pinochet, Air Force General Gustavo Leigh, Navy Admiral José Toribio Merino, and Carabinero Chief General César Mendoza — was sworn in the same evening. The following day, the four drafted an official document suspending the 1925 constitution and Congress and establishing the Junta as the country's supreme authority. Pinochet was designated as its first president, and the four verbally agreed to rotate the office. Shortly after, the Junta established an advisory committee, which Pinochet was successful in staffing with Army officers loyal to himself. One of their first recommendations was to discard the idea of a rotating presidency, arguing it would create too many administrative problems and lead to confusion. In March 1974, six months after the Junta's establishment, Pinochet verbally attacked the Christian Democratic Party and stated that there was no set timetable for a return to civilian rule. On 18 December 1974 Pinochet was declared Supreme Leader of the nation. After that date, the junta functioned strictly as a legislative body until the return to democracy in 1990.