Patrick K ODonnell is a combat historian author and public speaker who has written ten books recounting Americas wars He is an expert on elite and special operations units and irregular warfare and expert on the Office of Strategic Services Americas special operations forces during WWII and forerunner of the CIA He discusses his latest book Washingtons Immortals The Untold Story of an Elite Regiment who Changed the Course of the Revolution Mr ODonnell spoke at a Ford Evening Book Talk on July 5 2016