Austrian army Warrant Officer 1 Michael Neugebauer processes network control stations for different nations during exercise Combined Endeavor 2007 at Lager Aulenbach, Baumholder, Germany. The exercise, a U.S. European Command-sponsored exercise, brings the U.S. and other nations together, especially those in NATO or Partnership for Peace, to plan and execute interoperability testing of command, control, communications and computer systems in preparation for future combined humanitarian, peacekeeping and disaster relief operations.