The North Atlantic Treaty Organization (NATO) and its four partner countries in the Indo-Pacific—Australia, Japan, the Republic of Korea (ROK), and New Zealand—have entered a period of increased engagement. This engagement is taking shape in the context of the war waged by the Russian Federation (Russia) against Ukraine, NATO’s growing awareness of the security challenges posed by the People’s Republic of China (China), and important structural changes in the international system, including the return of strategic competition between the United States and China and Russia. It is occurring not only in bilateral NATO-partner relations but also between NATO and these Indo-Pacific countries as a group.