Edward Malcolm Buck was born on the human colony world of Draco III in 2510. In 2545 Buck joined the Orbital Drop Shock Troopers after the Covenant attacked his homeworld and massacred his family. He continued his rise in the ODSTs, taking command of Alpha-Nine squad in 2546, which he continued to command through many battles including the Fall of Reach and the Battle for Earth. After the war, Buck, along with Alhpa-Nine squadmates Romeo, and Mickey, were put through the Spartan-IV training and augmentation program, and continued as a unit until 2555 when Buck was betrayed by Mickey who sympathized with the insurrectionist cause. Buck was later reassigned under Jameson Locke in Fireteam Osiris, and was involved in both the fall of Jul 'Mdama's Covenant, and the Raising of the Guardians.