After reaching the King Raven Baird asks Col. Loomis if he is just taking them to be shot somewhere else but before he responds the Shibboleth and Karn arrive, having survived the Lightmass Missile, and destroy the Raven, leaving the Gears only one option: to fight for their lives. Afterwards the Shibboleth will roar at you and the boss battle will begin. The Declassified should be at your left.