Roster of the Rainbow division (Forty-Second) Major General Wm. A. Mann commanding
"Roster of the Rainbow Division (Forty-Second)" by Major General Wm. A. Mann is a historical account written in the early 20th century. The book serves as a comprehensive roster for the 42nd Infantry Division, known as the Rainbow Division, detailing the officers and soldiers who served within it. The roster provides a glimpse into the composition and leadership of a significant unit in the U.S. military during World War I. The opening of the work introduces Lieutenant Harold Stanley Johnson's foreword, highlighting the formation and purpose of the roster. He emphasizes the importance of personal connections among soldiers for effective teamwork, noting that the Rainbow Division represents units from twenty-six states across the U.S. Johnson acknowledges the pride and honor of serving in this unit, especially as they prepare to be among the first American forces deployed to Europe in the Great War. The beginning also outlines notable figures within the division, including Major-General Wm. A. Mann and Colonel Douglass MacArthur, alongside illustrating the diverse backgrounds of its members.