Arrcade Fusion is a major NATO warfighting exercise conducted in Wildflecken, Germany. It is carried out under Allied Command Europe Rapid Reaction Corps (ARRC), known as NATO's 'spearhead' headquarters, which is supposed to react quickly to any conflict in the area. Arrcade Fusion 2000 happened from October 13-27 and involved around 5,500 people.
What is interesting about this particular exercise is that it is a command-post exercise (CPX), designed to train the headquarters staff of ARRC, and its divisions from 11 NATO nations. Computer aided simulation software is used, somewhat resembling a real-time strategy game, with a detailed map of Europe. This way, no troops or equipment at all are needed to be massed on the ground.