Abstract : ASW is an asset-intensive team sport that requires the efforts of the Navy's air, surface and subsurface communities. Today's ASW threat is different and more challenging than during the Cold War. A confluence of post-Cold War events vastly changed the nature of ASW and the way it needs to be approached in the future. The fall of the Soviet Union effectively removed the only open ocean ASW threat to U.S. Forces and subsequent regional conflicts focused the Navy's efforts and resources on the littorals. Navy post-Cold War focus on expeditionary warfare, presence and power projection ashore (strike) diverted ASW resources and fueled a mission creep that eroded both ASW capabilities and proficiency of traditional ASW forces. The US Navy in effect took an ASW holiday in the decade immediately following the end of the Cold War and has only recently refocused on ASW. Today's ASW asset- poor environment, restricted access ashore and the growing anti-access threat of modern dieselelectric submarines operating in harsh littoral waters requires a joint solution to the problem.