US Army troops in the Four creeks region of California return to quarters, officially ending the Tule River War. Fighting, however, will continue for a few more years. [Source: HistoryNet.]
Sen. Robert F. Kennedy was assassinated after claiming victory in California’s Democratic presidential primary. Gunman Sirhan Bishara Sirhan was arrested. [Source: the Orange County Register.]
Doris A. Davis becomes the first African-American woman to govern a city in a major metropolitan area when she is elected mayor of Compton, California. [Source: HistoryNet.]
Former US President Ronald Reagan dies at age 93 in Bel Air, California. [Source: Reagan Presidential Library.]
On June 5, voters expressed their displeasure at SB-1, a hike in gasoline taxes and automobile fees, by recalling State Senator Josh Newman (D-29) and replacing him with Republican Ling Ling Chang, whom he narrowly defeated in 2016.
In the same primary election, voters in Cypress approved Measure A, to rezone the property represented by Los Alamitos Race Course and chunks of the former Cypress Golf Course.