Unyielding: Marathons Against Illegal Mandates - Hardcoverby Thomas L. Rempfer (Author), Philip G. Zimbardo (Foreword by) Unyielding tackles a recurring topic of national importance as a history lesson for future generations. Controversial illegal medical mandates impacted military populations for many decades, but it was not until the COVID era that the American people witnessed similar overreach. Colonel Tom "Buzz" Rempfer's memoir retraces the anthrax vaccine history since it marked the first time the