William Abram Mann (July 31, 1854 – October 8, 1934) was a general officer in the United States Army.

[1] William A. Mann attended the schools of Altoona and obtained an appointment to the United States Military Academy.

[5] Mann served with the 17th Infantry Regiment in the Spanish–American War, participating in the Battle of El Caney and the Siege of Santiago.

[15] Mann left the Militia Bureau in 1917 to organize and train a division for overseas serviceand was succeeded by Jesse McI.

[16][17][18] Mann was within a year of mandatory retirement in November 1917, by which time he and his division had arrived in St. Nazaire, France, where it became part of the American Expeditionary Forces (AEF).

[19] He began to suffer from poor health after the organization moved to its new location at Vaucouleurs in Lorraine, making chief of staff Colonel Douglas MacArthur the de facto commander.

[21][22] Mann was relieved in command of the 42nd by Major General Charles T. Menoher, a West Point classmate of Pershing's, and soon returned to the United States and commanded the Department of the East until he retired from the army in July 1918.

[1] The USS General W. A. Mann (AP-112), a World War II troop carrier, was named for him.