- Koestler, Arthur1
- Kolarz, Walter1
- Kot, Stanisław1
- Krasnov, P. N.1
- Križanić, Juraj1
- Kubaev, Rauf1
- Kucharzewski, Jan1
- Leontovitsch, Victor1
- Leroy-Beaulieu, Anatole1
- Liberman, Simon Isaevich1
- Liddell Hart, Basil Henry1
- Lincoln, W. Bruce1
- Lisakovich, Viktor1
- Löwenthal, Richard1
- Makovskii, Sergei Konstantinovich1
- Malinin, Alexander1
- Marks, Steven G.1
- Massie, Robert K.1
- McCauley, Martin1
- Meyendorff, John1