Trae Booker was born to a poor family in Chicago, Illinois. However, growing up in a poor family didn't mean he wasn't happy. He was surrounded on all sides by family members and people that loved and cared for him. His parents weren't that great, they had him at a young age. Of course they loved him, but they knew nothing about being parents and how to properly raise their son. Thankfully, he had his uncles and cousins to take care of him and show him the way. He didn't have too many friends, but he didn't need all that. His family taught him everything he knew, and instilled in him their values and beliefs; that family comes first and when the time comes, you need to protect the members of your block. They weren't a normal gang, separating themselves from those who incite violence and sell drugs to vulnerable people. Unfortunately, other members of the block drifted further and further from the beliefs that Caine instilled in them. Years later, he would leave Chicago to follow some of his family to Chernarus. With them no longer in Chicago, he had no real reason to stay there. He'd rather be with his true family than those who just pretended like they were hot shit.
Life in Chernarus was easy and simple at first. The language barrier was the only issue, but eventually he learned bits of Chernarussian. His situation started to go downhill around the time the country fell into chaos amid military encounters between Chernarus and Russia. Soon after that, riots took place in large cities, resulting in a long line of people trying to escape the chaos of the country.