Quad Leaders Unveil Maritime Security, Supply Chain Initiatives at Delaware Summit

New cooperation between the United States, Australia, Japan, and India is largely focused on containing China.

U.S. President Joe Biden (3rd R) participates in a Quadrilateral Summit family photo with Australian Prime Minister Anthony Albanese (L), Indian Prime Minister Narendra Modi (2nd L), and Japanese Prime Minister Fumio Kishida (R) at the Archmere Academy in Wilmington, Del., on Sept. 21, 2024. Brendan Smialowski/AFP via Getty Images

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.