International Brotherhood of Teamsters Local 70, of Oakland, California, was chartered in 1901.
In the first decade of the twentieth century, the East Bay lagged behind San Francisco in
population (Oakland, Berkeley, and Alameda combined had less than 100,000 residents in 1900
while San Francisco boasted three-and-a-half times that) and organized labor activity. Many East
Bay laborers commuted to San Francisco each morning or were scattered in small, hard-to-organize
industries. Moreover, Oakland lacked San Francisco's tradition of union militancy and its
cadre of experienced labor leaders. East Bay unions were typically smaller, less organized, and
less likely to strike than their San Francisco counterparts.
This was true for Oakland-based
Teamsters Local 70 when contrasted with its San Francisco counterpart, Local 85, which was
charted in August 1900.