Camp Union near Sacramento , California was a military training center for the Union Army during the American Civil War . First constructed near Sacramento , across the river from Sutterville the camp operated from 1861 until it was evacuated due to the flood waters from the Great Flood of 1862 . The second camp site was located on the east side of the river in Sutterville . These camps primarily served as a training camps for California volunteer regiments . Toward the end of the conflict , the camp became a discharge center for returning troops until the post was closed and abandoned in 1866
Great Flood of 1862
Great Flood of 1862
Camp Union (California)