Military Affairs (nonnaval)
- Confederate Army
- Confederate Navy
- confidential
- conscript
- conscription
- consort
- Containment
- continental
- Convention on the Prohibition of the Development Production and Stockpiling of Bacteriological and Toxic Weapons 1972
- corporal
- corps
- Countdown
- Counterintelligence
- countermand
- Coup detat
- coy
- crackerjack
- Credibility Gap
- Crib
- crossbow