The use of the Britannian Infantry within the Empire is fairly unknown, and only a few instances of them being deployed are shown, usually when a Knightmare is too large to use. When they are, squads of Honorary Britannians and Britannians are likely to be used as "Grunt Work" like hunting down rebels in a ghetto. Britannian foot soldiers are heavily armed and armoured when helmeted electronic visors.
When they're not in their armour, army officers and soldiers are seen to be wearing blue uniforms.
The Royal Guard is a personal group of soldiers that serves members of the Imperial Family, and it has also been shown that the Knights of the Round also have their own Royal Guards. However, the full aspect of the Royal Guard is unknown.
Knightmare Frames are the most basic unit of the Britannian armed forces. They were orginally created by Britannians, and others began building their own Knightmares. Knightmare Frames are extremley powerful Robots with each having various abilities and weapons.
Vehicles like Tanks, Armord Personnel Carriers and other military vehicles are sometimes used by the Britannian Military. Large mobile bases such as "G-1" Bases are often deployed as a Command Centre and Field Hospital in potentially hostile territory.
Actual airplanes are rarely, if never, used in combat by the Empire, though VTOL Gunships and Knightmare VTOL are often seen, the latter used as Knightmare drop ships. Large hover ships like the Avalon are beginning to dominate the imperial skies. They serve much the same as landcruisers do on the ground, though still heavily-defended and capable of reaching considerable speeds.
Battleships are used in the Britannian Military but this division is not very important in the Military. This is why the Black Knights chose a Submarine as one of their first headquarters.
Knights are elite specialized armed forces within Britannia, usually Knightmare Pilots, that operate outside standard Britannian Military hierarchy. Many are under personal command of a member of the Royal Family.