In order of proficiency:
1. Personal firearms of all types, limited primarily to cartridge-based systems.
2. Technical aspects of modern (3rd and 4th Generation) warfighting at all (tactical, operational, and strategic) levels, with an emphasis on logistics and technology, especially naval and mechanized warfare.
3. Space travel and exploration, including nuclear-based systems.
4. Nuclear warfighting, including space operations.
1. Personal firearms of all types, limited primarily to cartridge-based systems.
2. Technical aspects of modern (3rd and 4th Generation) warfighting at all (tactical, operational, and strategic) levels, with an emphasis on logistics and technology, especially naval and mechanized warfare.
3. Space travel and exploration, including nuclear-based systems.
4. Nuclear warfighting, including space operations.