Gladsheim

Gladsheim was a city on the planet of Harvest That was the second city attacked by the Covenant on Harvest. Thousands of civilians died in the attack. There was one known person to survive the Covenant's attack.

Trivia
In Norse Mythology, Gladsheim is actually a realm of Asgard where Odin's hall, Valhalla is located, coincidentally a Multiplayer map in Halo 3.