Insurrection of 2494
From Halopedia, the Halo wiki
Template:Battle The battle was a loss of the Rebels.This is one of the first Insurrectionist battles.The UNSC had lost 4 destroyers and alot more men.The UNSC didnt find the Rebels Base which is in a Asteroid field.The base is still active as of 2517.
Sources
Halo:The Fall Of Reach.Pages 17 and 18.