died; in December Heriberto Reyes (Colonel of the Defensive Army of National Sovereignty) died. The following year the events of "El Dorado" (February 28, 1960) took place where several events occurred leading to several deaths including Luis Morales, Julio Alonso Leclair (head of the September 15 column), Manuel Baldizón and Erasmo Montoya. The conventional opposition, up to that point led by the Nicaraguan Communist Party, had not been able to form a common front against the dictatorship. The opposition to the dictatorship was established around various student organizations. Among its leaders, Carlos Fonseca Amador in the early 1960s. At the start of 1961 the New Nicaragua Movement (NNM) was founded by prominent leaders in education like Carlos Fonseca, Silvio Mayorga, Tomás Borge, Gordillo, Navarro y Francisco Buitrago; prominents leaders on workers issues such as Jose Benito Escobar; countryside leaders like Germán Pomares and small business leaders such as Julio Jerez Suárez. Legendary guerilla veteran Santos Lopez, who fought with Augusto Cesar Sandino, also participated in the NNM. The New Nicaragua Movement was established in three cities Managua, Leon and Estelí, however they were generally stationed in Honduras. Their first public activity was held in March 1961, in support of the Cuban revolution and in protest of the position that the Nicaraguan government held with Cuba. The NNM later dissolved to make way for the National Liberation Front. The New Nicaragua Movement soon dissolved with its members forming the National Liberation Front, FLN. Founding (1961–1970) The FSLN originated in the milieu of various oppositional organizations, youth and student groups in the late 1950s and early 1960s. The University of Léon, and the National Autonomous University of Nicaragua (UNAN) in Managua were two of the principal centers of activity. Inspired by the Revolution and the FLN in Algeria, the FSLN was founded in 1961 by Carlos Fonseca, , Tomás Borge, Casimiro Sotelo and others as The National Liberation Front (FLN). Only Borge lived long enough to see the Sandinista victory in 1979. A congress or assembly is not formed between all the prominent leaders of the various groups as the preparation would have required a prior theoretical process in order to create them. As a result the FSLN was not prepared for its own formation. Different discussions took place within the group as they came to a consensus on political ideas. Even in 1963, while still under the name of FLN, there