Jack or JD as he was known to his fellow soldiers was part of the NATO forces that was deployed on the 17th July reinforcing CDF troops in South Zagoria. The Lance corporal was out on patrol with 3 squadron when they was over run in the forest by the infected. JD was the only one of the squadron who managed to escape with his life. This had a major effect on JD as what he saw that day, his brothers at arms being torn apart by the infected will haunt him for the rest of his days.
JD before DAYZ was a guy who liked to laugh and mess around with his mates but he was very trust worthy and loyal to the people he loved. In fact he would do anything for the people he loved anything which could bring out the dark side of JD. Jack is a guy you want on your side and not an enemy.
Since JD managed to escape the horror that happened that day he has been alone surviving anyway he can, trying to figure out a way to get back the UK. He doesn't have a wife or girlfriend to go home to or any kids. He only has his mum, dad and two brothers. He hopes to find help soon as he is nearly at breaking point!