Julio Martínez is the brother of the infamous Jesus Martínez. Julio and his many brothers were born in Baywood, California where he would spend the first years of his life. He was constantly surrounded by members of MS-13 because of the Martínez family's association with the group. In early 1988, the Martínez Family was uprooted and taken to Takistan, the home country of Julio's father. Luckily MS-13's influence was spread to Takistan by this move and soon Jesus Martínez, Julio's brother, became the leader of MS-13's Drug Cartel in Takistan. Julio and his brothers used brutal and often times questionable tactics to spread there territory across Takistan, and soon enough they found themselves hauling massive amounts of drugs into Chernarus.