Cormack grew up within the slums of Belfast Ireland, born on the 5th of February, 1979 constantly surrounded by the influential ''Irish Republican Army'' therefore, it wasn't long until his late adolescence in which he'd actually had any formal affiliation with them. He'd seeked asylum within their ranks, disowned and shunned about by his parents. He'd started off small, smuggling a few so-called ''paracetamols'' across the street; roughing a few lads from the local area up. Wasn't until long before he'd be inflicting fatal injuries without remorse; drinking until then sun went down, and finding a false sense of camaraderie with he so-called, ''Brothers In Arms''. Eventually he'd become familiarised with standard 5.56 Automatic Rifles, and standard 9mm & 45ACP Weaponry, also additionally gaining the skill of going undetected/camouflaged within urban environment.
It wasn't until long he'd climbed his way throughout the hierarchy, being granted ''Sergeant At Arms'' for the Fourth Northern Division, granted by Matt Devlin (1950-2005), who'd taken part in the notorious 1981 IRA hunger strike and later became a leading member of the Sinn Féin party. Todd Andrews decided to send Cormack on the 14th of July for a weapon supply lines deal involving the borders of Takistan, Gnuram where he'd meet Siobhan Browne at the Chernarus airport, he was an associate of the Russia & IRA Arms deal. After a lengthy 3 days, the deal had finally concluded without any casualities or problems, until by October 17th 2017 When Cormack returned to the Chernarus airport only to be bewildered with the sight of panicking; personel, staff, and standard civilians. It soon became apparent an outbreak of infection had occurred. After that, Cormack was forced to endured the entire fall of Chernarus, emerging from it's rubble and continuing to survive the hardships ahead, losing all IRA/Russian Contacts, except Elliot.