The leaders of the Indo-Pacific Quadrilateral partnership (Quad)—the United States, Australia, Japan, and India—announced new efforts on Sept. 21 to boost their shared maritime security capabilities and expand other areas of regional cooperation.
President Joe Biden hosted the fourth in-person Quad Leaders Summit in Wilmington, Delaware, on Sept. 21 to discuss a range of topics concerning the four nations, including ways to enforce international law in the waterways of the Indo-Pacific.