sentences:  It was activated on 30 March 2011 at Moron Air Base, Spain to support Operation Odyssey Dawn, a mission to enforce a no-fly zone put in place to protect civilians in Libya during the escalating Libyan Civil War.The task of assembling an aerial refueling force initially fell to the 171st Air Refueling Wing of the Pennsylvania Air National Guard, starting with two tankers that were already at Moron to support planes rotating to and from the Middle East.The first four tankers of the 171st arrived on the morning of 20 March.