There were 35 permanent military camps built along 1,200 miles of the US and Mexico border. One is still standing and it is in Arizona. It starts in 1910. The Mexican Revolution breaks out and commanders at Fort Huachuca put a tent camp at the spot where the El Paso and Southwestern railroad crosses into Mexico. That line ran American-owned mines in Sonora up to processing sites on this side. The job was protecting the railroad, stopping smuggling, and keeping the fighting from spilling over. The men sent to do it were the 9th and 10th Cavalry and later the 25th Infantry. All-Black regiments formed after the Civil War. The Buffalo Soldiers. In 1919 the War Department replaced the tents with a permanent post. More than twenty adobe buildings. Barracks, officers’ housing, a hospital, a parade ground. Rebecca Orozco of the Naco Heritage Alliance has spent decades on this site and she puts the posting plainly. Part of it was racial, getting them out of sight. Part of it was that Black ...