Delta Force

1st Special Forces Operational Detachment-Delta (1st SFOD-D) is one of the United States Army's secretive Tier One counter-terrorism and Special Mission Units. Commonly known as Delta, or Delta Force, it was formed under the designation 1st SFOD-D. They are first mentioned in Ace Combat: Assault Horizon by Doug Robinson, who refers to them as "D-Boys". And are later seen in a MH-60L Blackhawk along with it's Door Gunner raiding a cargo ship.