From Halopedia, the Halo wiki
Dwarka was a human Outer Colony of the Unified Earth Government. Shortly after the Human-Covenant War began, the planet was glassed by the Covenant. A species of squirrels were native to this planet. An insurrectionist camp was once stationed on the planet, holding prisoners they interrogated for data against the UNSC.
After the war, the fetcher Oliver Birch came across a relatively intact and abandoned colony ship among the planet's field of debris, CAA Butterworth. The only survivor aboard the ship was a three-legged dog, Mabel.
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