Quad leaders From left to right: U.S. Pres. Joe Biden, Australian Prime Minister Anthony Albanese, Japanese Prime Minister Fumio Kishida, and Indian Prime Minister Narendra Modi during the Quad Leaders' Summit at the G7 Summit, Hiroshima, Japan, May 20, 2023. (more) The Quad international security grouping Also known as: QSD, Quadrilateral Security Dialogue Written by Andrew Pereira Andrew Pereira is an editor at Encyclopaedia Britannica. He covers a variety of topics, with a focus on Indian politics, foreign policy, and global affairs. Andrew Pereira Fact-checked by Britannica Editors Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Britannica Editors Last updated Nov. 20, 2025 •History The Quad, informal security grouping comprising four countries—Australia, India, Japan, and the United States. Originally formed in 2007, it became inactive the following year. The Quad was revived in 2017 and has been active since. Its stated goal is “to support an open, free, and inclusive Indo-Pacific,” a maritime region of geopolitical importance in the Indian and Pacific oceans that includes countries across South Asia, Southeast Asia, East Asia, several Pacific Islands, and parts of...

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