How: Sam was born on the island his mother was a tribeswoman and his father a solider.
Background: Since he was young he was raised by the locals and they tort him how to survive the island and its unknown dangers. When he was 16 he followed his father and joined the military group but him and his squad are made to search for supplies. for the last 5 years his squad has cleared the local area of supplies this means they have to go deeper into the island.
How: He is Sam's youngest brother.
How: Sam's younger brother.