Mission 20: Defense of the Enemies' Airbase

Defense of the Enemies' Airbase is the twentieth mission of Halo: Spartan Assault.

Introduction
After getting her convoy of Elephants safely across the Plateau, Spartan Palmer organized the construction of a series of makeshift defensive structures in order to protect the ships as evacuees loaded.

With a mix of outrage and desperation, the Covenant fought to reclaim their only means of escape. After succeeding in holding off the Covenant infantry, Palmer managed to get 23 Covenant spaceships off the ground. She saved hundreds of lives that would have otherwise been lost.