 The Confederates watched the California cavalry retreat, then they fell back to Tucson, to warn Tucson's garrison of the approaching Union army.Captain Calloway returned to the Pima Villages and started work on a permanent camp, throwing up earth works around the flour mill of Ammi White, who had been taken away with McCleve to Mesilla by the rebels a few weeks before.This earth work was named "Fort Barrett" in honor of their comrade killed at Picacho Pass.