WWI Era Letters from a First Cavalry Regiment Trooper in Arizona

The group of letters is comprised of seven letters from Walter J. Runkel of the U.S. Army First Cavalry Regiment in Arizona to 'Miss Sadie Kick' in Lebanon, Pennsylvania. There are also 12 letters to Miss Kick from friends or family members. The letters appear to date from 1918 to 1920. The letters are written in pencil and legible.