The Royal Onderon Militia, also referred to as the Onderon royal militia, the Onderon royal guard, or the Royal Army, functioned as the planetary defense militia for the Royal Court of Onderon. This highly skilled military unit was recognized by its members' distinctive grey armor, accented with maroon, and their use of laser lances during engagements.
Their main responsibility was to safeguard the reigning monarch of Onderon, who during the period of the Clone Wars was King Ramsis Dendup. Following Dendup's removal from power by the Separatists, the Royal Onderon Militia largely cooperated with the new government, providing protection for the Confederate-appointed leader Sanjay Rash. However, super tactical droid General Kalani suspected that certain members of the Militia were secretly aiding the Onderon rebels against the Confederacy, based on the advanced nature and coordinated execution of their weaponry and tactics.
Regardless of earlier actions, the Militia collectively supported the rebels after their commander, General Akenathen Tandin, switched his allegiance to the rebels, having been moved by the cause of one of their leaders. Reaffirming their loyalty to King Dendup, the Militia was placed under the overall leadership of the rebel commander, Steela Gerrera, and fought alongside the rebels against the droid forces. Despite suffering losses when the droids deployed new HMP droid gunships, and the deaths of two members while protecting King Dendup from commando droids, the Onderonian forces achieved victory, leading to Dendup's reinstatement as monarch. Tragically, Steela lost her life in the final confrontation. During her memorial service, two members of the Militia stood as honorary guards.