Staff Sergeant Liam Conor Callaghan was sent to Chernarus prior to the outbreak as part of Security Force Assistance Brigade (SFAB) as part of it's mission to carry out train, advise, and assist the Chernarussian Ground Defence Forces. He grew up in the streets of Derry with his brother Caolan, whom had also made his way to Chernarus as part of the volunteer force. Now, Liam finds himself alone and looking for his brother to survive the harsh new reality.
Liam Conor Callaghan, emigrated to the United States of America at the age of 18 and immediately enlisted into the United States Army as an 11B Infantryman where he saw combat in Iraq and Afghanistan before changing to an intelligence analyst with the Army where he participated in joint intelligence community operations between branches of the US Armed Forces and it's NATO partners. Liam was married at the age of 21 where he immediately had a son; however, due to his inability to cope with a civilian lifestyle he was divorced soon after. As far as where Liam's moral compass is, it's hard to say. Years of conflict downrange has warped him into a hardened man, he cares about tradition, loyalty, and order but not about freedom, dignity, or life. He plays by the rules but without mercy or compassion. He is comfortable in a hierarchy and would like to rule, but is willing to serve.