The 1st Battalion, 227th Aviation Regiment is an attack helicopter battalion that is a sub unit of the 1st Air Cavalry Brigade (1ACB), the aviation brigade for the 1st Cavalry Division. The battalion is an AH-64D Apache battalion based at Fort Hood, Texas. The unit's nickname is "First Attack" because it was the first army aviation battalion to operationally field both the AH-64A and AH-64D model Apache. In June 2012, "First Attack" returned from its most recent deployment to Operation Enduring Freedom where it was stationed at FOB Sharana in Paktika Province, Regional Command-East.