Largest country in Central America is triangular, 3 regions: Mosquito Coast of swamps and rainforests, mountains of central highlands, fertile hilly Pacific region, which holds largest lake in CA, Lake Nicaragua. Home to world's only freshwater sharks. 85% mestizos. Miskito Indians -mixed race of black slaves brought by British and locals. 1979 after 30 years of repression, Somoza overthrown by Sandinista party. US feared communist foothold so they organized 'contras' to wage war against Sandinistas. After 10 years of war, the Sandinistas yielded to US demands for free elections. 1990, coalition party defeated Sandinistas.