From the Introduction: "The U.S.-Australian defense and intelligence relationship is one of the United States' closest security partnerships. Its foundation is the Australia-New Zealand-United States (ANZUS) alliance of 1951. Australia has fought side by side with the United States in most of its key conflicts including World War I, World War II, Korea, Vietnam, and more recently in Iraq and Afghanistan. The two nations are members of the Five Eyes intelligence group and have a Free Trade Agreement and many people-to-people ties. [...] This report explores the drivers of Australia's changing strategic posture before discussing the specific policy adjustments Australia is undertaking. The report also examines the geopolitical context of Australia's strategic and defense relationships in the Indo-Pacific."
CRS Report for Congress, R46571
Congressional Research Service: https://crsreports.congress.gov/