In 1937, the first of the Somoza presidents of Nicaragua took power. In the 1960s, the Nicaraguan Revolution began by a rebel group called the Sandinista National Liberation Front. During that time period Mexico, although initially a supporter of the Somoza's, soon changed position and offered support to the Sandinistas. In May 1979, Mexico broke diplomatic relations with Nicaragua over repeated human rights abuses carried out by the government of Anastasio Somoza Debayle. In July 1979, Anastasio Somoza Debayle was removed from power and Mexico re-established diplomatic relations with Nicaragua. In 1990, Mexico, along with the government of Colombia, Panama and Venezuela created the Contadora Group to try and mediate in the Central American crises that was gripping the region at the time. The Nicaraguan revolution came to an end after the election of President Violeta Chamorro in 1990.