- Canaris, Wilhelm: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
- Čatloš, Ferdinand: 1, 2
- Caucasus: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18
- CheKa (Extraordinary Commission): 1, 2, 3, 4, 5
- Chekist: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
-
- Chernov, Ivan: 1, 2, 3, 4, 5, 6, 7
- Cherepanov, Aleksandr: 1
- Chertov, Ivan: 1
- ChON ([Military] Formation for Special Tasks): 1, 2
- Christian Ludwig, Duke of Mecklenburg: 1
- Christmann, Kurt: 1, 2, 3
- chsiry (members of a traitor’s family): 1, 2, 3, 4, 5, 6
- Churchill, Winston: 1, 2, 3, 4, 5, 6, 7
- CIC (American military counterintelligence): 1, 2, 3
- Clark, Mark: 1, 2
- Comintern: 1, 2, 3, 4
- Continuation War: 1
- corps: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48
- corpse: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
- Cossack: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
- Council of Commissars: 1, 2, 3, 4, 5, 6, 7, 8, 9
- Council of Ministers: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
- Courland: 1, 2
- court: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46
- Crane, John A.: 1
- Crimea: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
- Crimean Peninsula: 1, 2
- Criminal Code: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
- Crome, Hans (Johannes): 1
- Czaplinski, Henri: 1
- Czechoslovakia: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10