The “Quad” nations—comprising the United States, Japan, India, and Australia—are stepping up their collaboration in the Indo-Pacific with a major new initiative.

By 2025, they plan to launch joint coast guard patrols, marking a significant step in their collective efforts to ensure maritime safety and uphold international law in one of the world’s most contested regions.

But what does this mean for the Indo-Pacific, and why should we pay attention? Let’s break it down.

A United Effort for Maritime Security

First, let’s talk about why the Indo-Pacific matters so much.

Again and again, the Indo-Pacific region is one of the busiest and most strategically important waterways on the planet.

Countries across the globe rely on these waters for good old trade, and there’s a lot at stake when it comes to territorial disputes. Think of the South China Sea, for one, where overlapping claims have caused tension for years, particularly with China’s growing assertiveness.

Enter the Quad. It may sound like a fun way to get from the farmhouse to the barn, but no, it’s a Quadrilateral Security Dialogue (Quad) established in ’07 that is all about promoting a free and open Indo-Pacific.

Their latest pledge, which took place last September 21, to conduct joint coast guard patrols is a big deal because it marks their first “Quad-at-Sea Ship Observer Mission.”