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190522-N-LN093-1208 SANTA RITA, Guam (May 22, 2019) – An aerial view of U.S. Naval Base Guam shows U.S. Navy, Royal Australian Navy, Japan Maritime Self-Defense Force and the Republic of Korea Navy, vessels moored in Apra Harbor, in support of Pacific Vanguard (PACVAN), May 22. PACVAN is the first of its kind quadrilateral exercise between Australia, Japan, Republic of Korea, and U.S. Naval forces. Focused on improving the capabilities of participating countries to respond together to crisis and contingencies in the region, PACVAN prepares the participating maritime forces to operate as an integrated, capable, and potent allied force ready to respond to a complex maritime environment in the Indo-Pacific region.