The Mara Salvatrucha gang originated in Los Angeles, set up in the 1980s by Salvadoran immigrants in the city's Pico-Union neighborhood who immigrated to the United States after the Central American civil wars of the 1980s.
Definition. The Sierra Club is the oldest grassroots environmental organization in the United States. The organization was founded in 1872 by a San Francisco group of professors, businessmen, and other professionals led by John Muir (Cohen 1985, 10).
The English word sierra, rugged range of mountains having an irregular or jagged profile, is a borrowing of Spanish sierra. In Spanish, sierra literally means saw, but the word is also used in the extended meaning line or group of mountains with a jagged profile.. As a further example of how a word meaning saw can become a word meaning mountain range, we need only mention the Sawtooth Mountains of central Idaho.