Hhallas is a planet in the Kilrathi Empire and a Kilrathi colony, the homeworld of the noble hrai nar Hhallas. Its landscape has wild mountains and untamed wilderness with grassy rolling hills and rowing merrgha leaves. Herdmasters tend herd-beasts. Ralgha nar Hhallas, Hassa and Kirha were born there.
After a failed battle against the Terran Confederation, the Kilrathi destroyed some human colonies. The Confed attacked Hhallas in retaliation. During the attack, the local kalrahr mistakenly fired against a Kilrathi ship before confirming the identification code. That ship contained all the nar Hhallas hrai and their retainers.