Knightmare Frames (ナイトメアフレーム Naitomea Furēmu?), or simply Knightmares, officially designated as the Humanoid Autonomous Armored Knight, are a form of mecha in the Sunrise anime series Code Geass: Lelouch of the Rebellion. In the series, they were developed by the Holy Britannian Empire. Unveiled during the invasion of Japan, Knightmare Frames are almost exclusively used in place of the practically obsolete main battle tanks. The name "Knightmare Frame" is a play on the words knight, mare (as in a horse, a Knight's steed), and nightmare. this one is a fourth-generation Knightmare Frame and the first mass-production model produced by the Holy Britannian Empire. It actively contributed to the invasion of Japan, providing an overwhelming tactical advantage over conventional combat vehicles. with original purpose