Periodicals 15 Periodical 9 Science 7 Technology 7 Armies 6 Military supplies 6 Weapons systems 6 Communications, Military 4 Telecommunication equipment 4 Hovercraft 3 Hydrofoil boats 3 Weapon systems 3 Aeronautics, Military 2 Armored vehicles, military, Artillery, Ordnance 2 Arms and armour 2 Artillery 2 Communication, military 2 Foreign relations 2 Industrial mobilization 2 International economic relations 2 Security, International 2 World politics 2 equipment 2 Aeroplanes, Military 1 Airplanes-Periodicals, Airships-Periodicals, Aeronautics-Periodicals 1 Airships-Periodicals, Aeronautics-Periodicals, Airplanes-Periodicals 1 Armed Forces 1 Armoured vechicle, Military 1 Armoured vehicles, Military 1 Artillery, Ordnance, Armored vehicles, military 1