Occupied in 1916-17 by Indiana, Nebraska, Minnesota and North Dakota National Guard units, Camp Llano Grande was one of a line of encampments established along the Rio Grande in response to Mexican bandit raids into the U. S. Covering over 200 acres, it included a headquarters building, commissary, and recreational facilities. South of the railroad tracks were parade grounds, tent encampments, and stock pens. The camp was abandoned in March 1917, one month before the U. S. entered World War I, and former Llano Grande troops were called for war service in France.