 Reardon received a Bachelor of Science from Allegheny College in 1974, a master's at University of South Carolina in 1980, and a doctorate at University of Kentucky in 1987.In addition to teaching at Penn State, Reardon is a visiting professor at United States Military Academy at West Point and has taught at the U.S. Army War College.Reardon has been a faculty member at Marine Corps Command and Staff College, U.S. Army War College, U.S. Army Military History Institute, and University of Georgia.