The United States Army is the land warfare branch of the United States Armed Forces. Army Aviation also operates a significant number of helicopters. It was formed on June 14, 1775 and currently has an estimated 549,015 active personnel. The United States Army appears in Ace Combat: Assault Horizon as one of the playable factions.
In the Assault Horizon universe, the United States Army contributed personnel and equipment to the North Atlantic Treaty Organization Task Force 108, a multinational force intended to combat the potent SRN insurgency in East Africa.
- AN/TWQ-1 Avenger (Jericho, seen in the mission "Akula", in the neighborhoods on the bank of the Potomac)
- MIM-104 Patriot (Jericho)