H. R. McMaster

American Army General (retired) — National Security Advisor under Trump (2017–18) — author of Dereliction of Duty (the most important critique of Vietnam-era military leadership) and Battlegrounds — PhD historian — who won the Battle of 73 Easting.

Creates the definitive account of how the JCS failed during Vietnam — McMaster's Dereliction of Duty argues that the Joint Chiefs of Staff knowingly gave President Johnson misleading advice about Vietnam, violating their constitutional duty; this argument reshaped how American officers understood their obligation to speak truth to civilian leaders.