Seeking my grandfather's WWI military records

Ms. Meissner,

Here is some information below. Served in the 5th Calvary at Ft. Bliss, TX prior to going to the Mexican Boarder for patrol.

In 1916, the Regiment was dispatched to the Mexican border to serve as part of the Pancho Villa Expedition commanded by General John "Black Jack" Pershing. Commanded for part of its border service by William Jones Nicholson,^[11][12] the Regiment crossed the Rio Grande into Mexico and was successful in stopping the border raids conducted by bandits of Pancho Villa who had expanded their criminal operations into the United States, and had brought death to American citizens. The Regiment remained with the Punitive Expedition in Mexico, until 5 February 1917. When the United States entered World War I in April 1917, the 5th Cavalry was selected to remain stateside and defend against incursions along the Mexican border.^[10]

After several relocations, in October, the Regiment moved into Fort Bliss, relieving the 8th Cavalry Regiment. Following the Mexican Punitive Expedition, the 5th Cavalry Regiment was spread throughout Texas helping safeguard wagon trains, patrolling the Mexican border and training.^[10] In 1918, airplanes and tanks had emerged from World War I as the weapons of the future. However, the long history of the Cavalry was not finished. The cavalry remained as the fastest and most effective force for patrolling the remote desert areas of the Southwest and Mexican border. Airplanes and mechanized vehicles were not reliable enough or adapted for ranging across the rugged countryside, setting up ambushes, conducting stealthy reconnaissance missions and engaging in fast moving skirmishes with minimal support. In many ways, it was just the beginning of a new era. 5th Cavalry troopers were getting into frequent, small scaled combats with raiders, smugglers and Mexican Revolutionaries along the Rio Grande River.^[7] In one skirmish in June 1919, four units, the 5th and 7th Cavalry Regiments, the 8th Engineers (Mounted) and 82nd Field Artillery Battalion (Horse) saw action against Pancho Villa's Villistas. On 15 June, Mexican snipers fired across the Rio Grande and killed a trooper of the 82nd Field Artillery who was standing picket duty. In hot pursuit, the troopers and the horse artillery engaged a column of Villistas near Ciudad Juárez. Following a successful engagement, the cavalry expedition returned to the United States side of the border.^[7]