The Warrior Guild is one of the five guilds of Krypton. Attested as the backbone of Kryptonian civilization, members of the guild comprised of a planetwide military organization, consisting of both ground forces and military aircraft such as Hammerheads and dropships.
It also provided security personnel across the planet, such as the Sapphire Guards.
Krypton's Warrior Guild had existed since the planet's Golden Age, as innovation began to flourish.
In 1980, believing that the Kryptonian Law Council had led Krypton astray, guild leader General Zod created the Sword of Rao movement, out of warrior class members to supplant the Council and install himself as absolute ruler and restore Krypton's glory. Zod's troops engaged the loyalist Warrior Guilders in an aerial battle across the city of Kandor. After Jor-El escaped Zod's men and stole the growth codex, Zod pursued Jor-El, gifting the Warrior Guild chance to re-group and consolidate their forces. They chased General Zod, surrounding and outnumbering him with Gunships. Shortly after sentencing Zod and his followers to the Phantom Zone, most of its remaining forces were destroyed along with the planet.
Some members loyal to General Zod survived and tried to rebuild Krypton. They eventually followed a signal emitted by the Fortress of Solitude to Earth and engaged both Superman and the United States military forces. They were eventually sucked back into the Phantom Zone, shortly before Superman killed General Zod in Metropolis.