The term 'Nicaraguan Guerrilla' refers to the Contras, a rebel group that fought against the Sandinista government in Nicaragua during the 1980s. The Contras were funded by the United States and other countries in an effort to overthrow the Sandinista government. The Contras were known for their guerrilla tactics, which included ambushes, sabotage, and raids on government targets. The conflict ended in 1990 with the signing of a peace agreement between the two sides.