In 1911, the federal government broke Standard Oil into several pieces under the Sherman Antitrust Act. One of those pieces, Standard Oil Co. (California), went on to become Chevron. It became part of the "Seven Sisters", which dominated the world oil industry in the early 20th century. In 1926, the company changed its name to Standard Oil Co. of California (SOCAL). By the terms of the breakup of Standard Oil, at first Standard of California could use the Standard name only within its original geographic area of the Pacific coast states, plus Nevada and Arizona; outside that area, it had to use another name.