A new era of defense construction begins. Westward expansion and industrialzation in the late 1800's led to growth as a great world military power. San Francisco was identified as the second most important strategic military site in the United States.
Centuries of Defense - Bringing Defense into the 20th Century (1884 – 1932)
Original panel for "Bringing Defense into the 20th Century (1884-1932)" (PDF, 65.7 MB)
Last updated: February 28, 2015