text: Stockton is the site of the first Sikh temple in the United States; Gurdwara Sahib Stockton opened on October 24, 1912. It was founded by Baba Jawala Singh and Baba Wasakha Singh, successful Punjabi immigrants who farmed and owned  on the Holt River.
  In 1933, the port was modernized, and the Stockton Deepwater Channel, which improved water passage to San Francisco Bay, was deepened and completed. This created commercial opportunities that fueled the city's growth. Ruff and Ready Island Naval Supply Depot was established, placing Stockton in a strategic position during the Cold War. During the Great Depression the town's canning industry became the battleground of a labor dispute resulting in the Spinach Riot of 1937.
  During World War II, the Stockton Assembly Center was built on the San Joaquin County Fairgrounds, a few blocks from what was then the city center. One of 15 temporary detention sites run by the Wartime Civilian Control Administration, the center held some 4,200 Japanese-Americans removed from their West Coast homes under Executive Order 9066, while they waited for transfer to more permanent and isolated camps in the interior of the country. The center opened on May 10, 1942, and operated until October 17, when the majority of its population was sent to Rohwer, Arkansas. The former incarceration site was named a California Historical Landmark in 1980, and in 1984 a marker was erected at the entrance to the fairgrounds.