Camp Lawrence J. Hearn

Beginning in 1916, the Third Oregon Infantry established the post during its border service.^[2][3] The United States Army maintained Camp Lawrence J. Hearn in honor of Major Hearn of the 21st Infantry Regiment in order to patrol the border during the Mexican Civil War.^[4] It was manned by the 1st Cavalry Regiment.^[5] It was abandoned in August 1920 but re-established by the 11th Cavalry Regiment in October of that same year.^[6] Brigadier General F.C. Marshall visited the post just before he died in a plane crash while traveling to Tucson, Arizona.^[7] Until 1921 the post consisted of a tent cantonment with no permanent structures and soldiers requiring medical care would be sent to Fort Rosecrans for treatment.^[8][9] Conditions on the post did not improve significantly. Army Chief of Staff Major General Summerall described them as being like a "logging camp" composed of "tumbledown shacks".^[10] In 1924, cavalrymen from the post assisted local officers and federal agents in enforcing a 9 pm curfew at the international border crossing.^[11] It continued to be in use until it was abandoned in 1931.^[12][13] Later the Coastal Artillery Corps considered the former post as the site of a future battery. This, however, was never built.^[14]