 Two years later after the start of the American Civil War, Brigadier General Edwin V. Sumner ordered the post abandoned and the buildings burned down on May 28, 1861 in order to withdraw the regular troops to garrison Los Angeles against an anticipated secessionist uprising.Later that year the regulars were sent east to serve with the Union in the Civil War.On May 19, 1863, the post was rebuilt and re-garrisoned by companies B and I of the 4th California Infantry; they were assigned to protect the travelers along the Mohave and Prescott road.