Toombs held the rank of Colonel within the Alliance to Restore the Republic's Special Forces. He played a role in the planning stages of Operation Cobolt, and, together with Gideon, spearheaded the strike forces tasked with infiltrating the Imperial orbital base positioned above Mantooine. Their mission was to retrieve a newly developed Scandoc decoding computer belonging to Imperial Intelligence. Toombs met his death while participating in this operation, prompting Madine to seek approval from Mon Mothma to nominate Toombs for a posthumous promotion and award.