The United Rebel Front is an Insurrectionist faction in the Halo universe. They seek liberation from the influence of the Unified Earth Government. They mostly operate out of the 111 Tauri system and the Eridanus system.
They are led by a trio of generals: Robert Watts, Howard Graves and Jacob Jiles.
The Unified Rebel Front faced resistance from a four-man team of SPARTAN-II rsoldiers known as Blue Team. The team interfered with several URF operations such as Station Jefferson or the destroyer URF Origami and a saboteur cell on Reach, as well as an incident in Micronesia, and a high-explosives manufacturing facility at an unspecified location.
Howver, the rebels gathered together three stolen FENRIS Nuclear Warheads at Camp New Hope. The Office of Naval Intelligence soon took notice and the URF contacted the UNSC CENTCOM, offering to trade the nukes in exchange for medicines for their people suffering from Boren's Syndrome. Anticipating that Blue Team would be sent the URF set up a trap for the SPARTANs.
The Insurrectionists ambushed John-117, Frederic-104, Kelly-087 and Linda-058 using an antigravity plate. However, the team's newest member, Kurt-051, avoided the trap and freed the other members of Blue Team. The SPARTANs retreated before launching a counter-attack that resulted in the death of General Howard Graves was killed in the process.
IN 2557 the remaining URF forces set up base the hydroelectric platforms on Terceira. However, the SPARTANs were soon deployed against them again.