sentences:  The Petaluma Council (#041) was founded in 1919, later named the Petaluma Area Council.This council renamed itself the Sonoma-Mendocino Area Council when the Scouting districts of northern Sonoma County and Mendocino County were separated from Silverado Area Council in 1942.In 1992, the Sonoma-Mendocino Council merged with the Redwood Area Council (#044), to form the Redwood Empire Council.