The Quadrilateral Security Dialogue (also known as the Quad) is a strategic security dialogue between Australia, India, Japan, and the United States.

It was initiated in 2007 by Japanese Prime Minister Shinzo Abe, with the support of Australian Prime Minister John Howard 

Indian Prime Minister Manmohan Singh and U.S. Vice President Dick Cheney. 

The dialogue was paralleled by joint military exercises of an unprecedented scale, titled Exercise Malabar. 

The Quad's objectives include: 

Promoting a free and open Indo-Pacific region that is inclusive and based on the rule of law. 

Countering China's growing military power and assertive behavior in the region. 

India has been a key member of the Quad since its revival in 2017. 

India sees the Quad as an important forum for cooperation with like-minded countries on issues of 

common interest, such as maritime security, counterterrorism, and disaster relief. 

The United States views the Quad as a key part of its strategy to maintain a free and open Indo-Pacific region. 

The Quad is a forum for cooperation between the United States, Australia, India, and Japan on 

issues of common interest, such as maritime security, counterterrorism, and disaster relief.  

Australia has been a strong supporter of the Quad since its revival in 2017.  

Japan has been a strong supporter of the Quad since its revival in 2017.