Sam Vostok was a male serving in the COG during the Locust War. Lying alongside his sister at the age of 14, Sam joined in order to both help feed his impoverished family, as well as help stem the fight against the enemy ahead. Sam served with distinction for 12 years, separated from his sister until after the sinking of Jacinto.
Soon discovered by their commanding officer at boot camp as being underage, the Vostok twins were not removed from service, but instead continued on with their training, and sent off into the reserves. However, the dwindling rate of men available, combined with the Vostok twin's experience with vehicles, meant that they were soon placed in frontline roles against the Locust, both of them separated under military regulation. They would be assigned to separate armored regiments and sent off, ready to fight and die for the COG.