In which year was this military base established that functioned as a World War II armament storage depot and is located near Seal Islands?
Seal Islands (California): Seal Islands are a pair of islands in Suisun Bay at the mouth of the Sacramento-San Joaquin River Delta in Contra Costa County, California, 10 km east of Benicia, and 500 metres off-shore from the former Concord Naval Weapons Station and Port Chicago Naval Magazine. Concord Naval Weapons Station:  The station functioned as a World War II armament storage depot, supplying ships at Port Chicago.
i don't know