"North Korea has invaded South Korea's capital city, Seoul. On your first mission as a U.S. Marine, your squad must help to push the attackers back and reclaim the city." then you Destroy the Havoc Launcher but when your best friend will put the Demo Charges but the door close on his arm so the ship blows up then a flying piece of Metal flies on cut off your arm then time skip to a day later you Pay your Respects then Jonathan Irons give you a business card to join atlas so you join