High Quality Content by WIKIPEDIA articles! The Brown Berets is a Chicano nationalist activist group of young Mexican Americans that emerged during the Chicano Movement in the late 1960s and remains active to the present day. The group was seen as part of the Third Movement for Liberation. The Brown Berets focus on community organizing against police brutality and advocate for educational equality. Several groups have been quite active since the passage of California Proposition 187. Units exist in most sections of California and a few in other southwestern states.