battle group Delta or D was a United Nations Space Command battle group (within the UNSC Navy) made up of 15 ships it was sent to Higher Polkas to investigate why it had gone dark and was destroyed by the covenant fleet orbiting Higher polkas. -Marathon-class cruiser -Halcyon-class Cruiser -King-class Destroyer -Charon-class frigate -UNSC I Told You So (king class) -UNSC give'em hell (marathon class) -UNSC Midsummer Night (Charon class)