1. In 1850, the U.S. Army established a military post in San Diego. Originally called Fort Stockton, it was later renamed Fort Yuma.

2. In 1880, the Southern Pacific Railroad completed a line from San Francisco to Los Angeles, connecting the two cities for the first time by rail.

3. In 1934, the first Pacific Ocean swim by a woman was completed by Florence Chadwick, who swam from Catalina Island to the California mainland.

4. In 1969, astronaut Neil Armstrong trained at Edwards Air Force Base in California, preparing for his historic moon landing on July 20.

5. In 1995, the San Francisco Giants baseball team played their first game at their new home, AT&T Park. The stadium, located on San Francisco Bay, has since become one of the most iconic in all of baseball.