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Henry J. Kaiser-class replenishment oiler USNS Big Horn (T-AO198) conducts underway replenishments in the Philippine Sea with partners and allies as part of Annual Exercise, Nov. 21-30. Naval forces from Australia, Canada, Germany, Japan and the United States took part in the multilateral, multinational exercise, led by the Japan Maritime Self-Defense Force. The exercise helps strengthen enduring relationships while sharpening naval proficiencies.