CIRCE PT3OF3

HISTORY TODAY – JANUARY 21 2025CIRCE and Tactical COMSEC in Vietnam—When Good Enough is Better thanPerfect (Part 3)Author: Brian C. O’ReillyThis is the final installment of a three-part series; the previous articles werepublished in History Today the last two Tuesdays.PART III: CIRCE Compromise and ReplacementNote: In Part I, we explored the nature of Communications Security (COMSEC)challenges and failures in the Vietnam War that led to the need for a tacticalCOMSEC system to adequately protect...