On 9 April 1961, Brigade 2506 personnel, ships, and aircraft started transferring from Guatemala to Puerto Cabezas. Curtiss C-46s were also used for transport between Retalhuleu and a CIA base (code-named JMTide, aka Happy Valley) at Puerto Cabezas.
On 10 January 1978, the editor of the Managua newspaper La Prensa, and founder of the Union for Democratic Liberation (UDEL), Pedro Joaquín Chamorro Cardenal was murdered by suspected elements of the Somoza regime, and riots broke out in the capital city, Managua, targeting the Somoza regime.
Following the riots, a general strike on 23–24 January called for the end of the Somoza regime and was, according to the U.S. State Department staff at the U.S. Embassy, successful at shutting down around 80% of businesses in not only Managua but also the provincial capitals of León, Granada, Chinandega, and Matagalpa.
On 22 August 1978 the FSLN staged a massive kidnapping operation. Led by Éden Pastora, the Sandinistan forces captured the National Palace while the legislature was in session, taking 2,000 hostages. Pastora demanded money, the release of Sandinistan prisoners, and, "a means of publicizing the Sandinista cause."After two days, the government agreed to pay $500,000 and to release certain prisoners, marking a major victory for the FSLN.
The 1984 election took place on 4 November. Of the 1,551,597 citizens registered in July, 1,170,142 voted (75.41%). The null votes were 6% of the total. International observers declared the elections free and fair, despite the Reagan administration denouncing it as a "Soviet style sham".