Mission 4: Live to Fight

"Although the UNSC forces successfully slowed the Covenant, enemy numbers were too great to halt their advance indefinitely. A continuous stream of Covenant infantry, Wraiths, and air support were moving towards Research Facility Alpha. Having concluded that returning to the main facility would be useless, Spartan Palmer began fighting her way upstream through the invasion in an attempt to reach one of the northern outposts. Her plan was to destroy Covenant air support and give the UNSC Hornets a chance to land near the outposts. The ultimate goal was to get off of X50 and warn Draetheus-V of the Covenant invasion."

- Mission summary