 The first production helicopters were sent to the National Training Center (NTC), Fort Irwin, California for medical evacuation missions in January 2007.On 20 June 2007, the NTC's US Army Air Ambulance Detachment (USAAAD) became the first operational unit to field the Lakota.On 10 July 2007, the Training and Doctrine Command (TRADOC) Flight Detachment at Fort Eustis, Virginia became the second US Army unit fielded with the UH-72A.