The Youngest General in U.S. Ari Force history is
Brig. General Richard C. Sanders (WWII) born Aug 1915 & promoted to Brig Gen in June, 1944 (Age 28years 10 months)
http://www.af.mil/information/bios/bio.asp?bioID=7029
General Douglas MacArthur.
probably General Armstrong Custer during the Civil War
George Armstrong Custer became the youngest brigadier general in the Union army. Despite having no direct command experience, he became the youngest brigadier general in the UnionArmy at age 23 during the US Civil War. Custer was a West Point graduate and was present at General Lee's surrender at Appomattox. He was killed years after the war by a Native American attack on his troop in the West.
The youngest possible US Army soldier possible by US Army Regulations is 17 1/2 years old.
George Cluster
The youngest general officer in the Union army, Custer was reckless and brave, but led his men in many successful campaigns.
sanders
General George Washington was the Commanding General of the Continental Army
Custer and James Gavin
Retired US Army General Shinseki is the new US Veterans Affairs Director.
I would say George Armstrong Custer.
General of the Army Dwight David Eisenhower