Robert had always had always dreamed of serving in the corps. There was a tradition of military life in his family. His father and his father and his father before him had all been servicemen on the line. Heck, his mother and father had met in the service. Robert spent years looking forward to the day he could sign on.
On his 18th birthday he walked into the recruiting office, a short while afterwards he walked out carrying his orders. He’d been inside several times before, working with the recruiters on just what he was in for. Training went as he’d expected, as his father had prepared him for.
Six years into his tour of duty, Staff Sergeant Isaacsohn was on a detail escorting a Vex Diplomat. Until this point it hadn’t seemed like humans and Vex could share much, biologically. Robert proved this theory wrong. The diplomat was carrying the Vex equivalent of a cold. It was a minor irritation for him. He didn’t even think of mentioning it when he was approaching Terra Prima.
For Sergeant Isaacsohn it meant the world. It cost him an arm and a leg. The virus reacted to human tissue far differently than it did to the Vex. His body began rejecting its own parts. He’d lost his left arm, right leg and half of his liver before they eventually put him into stasis while they researched how to save him. He spent four years out of the loop before he was woken up.
The virus was purged from his system, but it’s effect could not be repaired. His body continued to reject replacement parts. It refused to even recognize that it needed a second arm or leg. Artificial parts were accepted as well as ever, but vat grown tissue was fully rejected.
Isaacsohn was moved to a training battalion in the Plains of Cassus. He excelled as a trainer, but his heart was broken. He’d enjoyed what he did. He’d enjoyed the feeling of being on the front line. His aim hadn’t suffered. He was still fully aware of how to fight and win a battle. He was just shy a few limbs.
When the call for a training officer on Nova Ark Isaacsohn jumped at the chance. He was ready for a change and this was about as extreme a change as he could find.