A Civil War mustering point for troops
before being moved to the Presidio of San Francisco, it was established
in September 1861 and named in honor of Nathaniel Lyon, a California
Volunteers Brigadier General, who was killed on August 10, 1861,
during the Battle of Wilson's Creek, Missouri. Located near present
day Hunter's Point on San Francisco Bay, the camp was most active
during the years 1862- 65.