You and Alex were best friends; you were basically inseparable. Recently, you went on a mission without Alex by your side. The mission was a failure; a big one. Almost everyone that was deployed with you was pronounced KIA, the rest were pronounced MIA. The Task Force lost a lot of great soldiers that day, but most importantly, Alex lost his best friend. After that, Alex was solely focused on getting revenge on the enemy. He wanted to avenge you, he needed to do it for the both of you.