


Mission to Alpha Shard Main article: Mission to Alpha Shard The Colonial Guard was forced to ally themselves with an Office of Naval Intelligence unit to stop the terrorists from obtaining more of the element used to make the bioweapon.

On February 7, 2556, a Sangheili Zealot set off a new bioweapon that targeted humans in Sedra City, resulting in the strange infection of numerous civilians, and some deaths. History Terrorist attack on Sedra Main article: Terrorist attack on Sedra City
