The Senate Guard was made in 25,000 BBY, when the Senate Committee was first created when the Galactic Republic was. They protected many senators, and often worked with the Coruscant Guard and the Coruscant Security Force. Prior to the Battle of Naboo, they wore blue robes and Imperial Royal Guard-like helmets, but blue. Later in the Clone Wars, the Guards received blue clone trooper armor and clone trooper helmets, but the fins at the top were facing the opposite direction, and the had a slightly different visor.