Isaac-039 (Earth-5875)

Isaac-039 was a SPARTAN-II supersoldier of the UNSC Naval Special Warfare Command. Isaac became one of the few SPARTANs to survive the Fall of Reach in summer 2552.

Biography
Isaac-039 was born on 2511. When he was only six years old, in 2517, he was kidnapped by the Office of Naval Intelligence as a conscripted participant in the SPARTAN-II Program, headed by Dr. Catherine Halsey and Chief Petty Officer Franklin Mendez, on Reach. Like all others, he was trained by Mendez and the synthetic Déjà. After that, he would engage in multiple battles against the Covenant during the First Contact War, including the Battle of Sigma Octanus IV.

Fall of Reach
Isaac fought during the Fall of Reach in summer 2552, where he assigned to Red Team under Fred-104 as a shock infantry to defend orbital defense generators that powered Reach's orbital MAC guns. When they descended aboard the D77-TC Pelican Bravo 1, the dropship was hit by Covenant Type-26 Banshees and they crashed the vessel.

Isaac was then reassigned under William-043 as one of Fred's subdivisions, with their goal being to secure a fallback position in Castle Base. He, William, and Vinh-030 were separated from the SPARTANs, but they were able to arrive at the base. They were not able to enter the base until Fred and Kelly-086 met with them later on and Kelly whispered the Oly Oly Oxen Free signal. She later checked the perimeter for Dr. Halsey, only for the Covenant to almost immediatly attack the base.

Isaac, Vihn, Fred, Kelly, Will, and Dr. Halsey became trapped at Castle Base for the next days following the activation of Operation WHITE GLOVE, where the base was destroyed to keep the Covenant from getting its data.

Death
Following the discovery of the Menachite Complex beneath the Menachite Mountain, which contained a forerunner crystal, it sent a radiation spike that attracted the attention of the Covenant. The Covenant later dispatched a gravity lift, sending countless of soldiers to the SPARTANs' position. Isaac and Vihn dropped numerous charges to cover their tracks, however, it led to the nearby surroundings falling much quicker than expected, crushing both of them.