The Battle of Asteria was a conflict between the Terran Dominion and the Zerg Swarm over the planet of Asteria. Zerg forces entrenched in the Long Shadow canyons, and began launching attacks from across the planet. The Terran Dominion managed to beat the back into the valley, and gathered for a final push to drive the zerg from the planet.
Rho Squadron was assigned to move in with siege tank and goliath support. The siege tank fire covered them as their advanced on the hive cluster, while the goliaths began to lay into the structures. The squadron encountered a pack of zerglings that killed Albee, but the rest of the squad cut through them and destroyed the final hive cluster on the planet.