From the Annals of the Latinos – In 1921, the Order of Sons of America was founded in San Antonio. The OSA was one of the first Mexican-American civil rights organizations dedicated to protecting and advancing the interests of Mexican-American citizens. The OSA limited membership to U.S. native- born or naturalized U.S. citizens. The OSA believed that assimilation to American culture was the key to acceptance as equal members of American society. The OSA’s policy of excluding Mexican immigrants and taking a stance against large scale immigration was controversial, but thought necessary in its campaign to persuade Anglos that Mexican-Americans were loyal Americans who were an integral part of society throughout much of the Southwest. This was rooted in a belief that preserving Mexican culture and traditions had resulted in Anglos not accepting them as equal American citizens. The OSA was ultimately merged with other organizations to found LULAC.