World Stage

Map details and sources

Familiar U.S.-alliance security lens

The Indo-Pacific treaty system links U.S. forward forces, host-nation infrastructure, and distributed deterrence. Lens owner: Washington-centered security planning view. As of 2026-07-14.

• USA · Focus: This scene is organized around U.S. treaty commitments, forward posture, and budgeted resilience investments in the Indo-Pacific. Sources: Ministry of Foreign Affairs of Japan, n.d., https://www.mofa.go.jp/region/n-america/us/q%26a/ref/1.html; U.S. Department of Defense, 2024-07-30, https://www.defense.gov/News/Releases/Release/Article/3854902/joint-statement-on-the-philippines-united-states-fourth-22-ministerial-dialogue/; Australian Department of Foreign Affairs and Trade, n.d., https://www.dfat.gov.au/geo/united-states-of-america/united-states-of-america-country-brief; U.S. Department of Defense Comptroller, 2025-06-12, https://comptroller.defense.gov/Portals/45/Documents/defbudget/FY2026/FY2026_Pacific_Deterrence_Initiative.pdf
• JPN · Partner: The 1960 Treaty of Mutual Cooperation and Security and Article VI basing arrangements make Japan a core host and treaty partner. Sources: Ministry of Foreign Affairs of Japan, n.d., https://www.mofa.go.jp/region/n-america/us/q%26a/ref/1.html; Ministry of Foreign Affairs of Japan, n.d., https://www.mofa.go.jp/region/n-america/us/q%26a/ref/2.html; U.S. Air Force, n.d., https://www.kadena.af.mil/; Commander, Navy Region Japan, n.d., https://cnrj.cnic.navy.mil/Installations/CFA-Yokosuka/Welcome-Aboard/
• KOR · Partner: The 1953 Mutual Defense Treaty and the centrality of Camp Humphreys make South Korea a core treaty and posture node. Sources: Avalon Project, Yale Law School, 1953-10-01, https://avalon.law.yale.edu/20th_century/kor001.asp; U.S. Army, n.d., https://home.army.mil/humphreys/
• PHL · Partner: The 1951 Mutual Defense Treaty, Visiting Forces Agreement framework, and EDCA expansion place the Philippines inside the active alliance map. Sources: Lawphil Project, Republic of the Philippines, 1951-08-30, https://lawphil.net/international/treaties/mutdef.html; U.S. Department of Defense, 2024-07-30, https://www.defense.gov/News/Releases/Release/Article/3854902/joint-statement-on-the-philippines-united-states-fourth-22-ministerial-dialogue/
• AUS · Partner: ANZUS and the U.S. Force Posture Initiatives, especially Marine Rotational Force-Darwin and related infrastructure, make Australia a key alliance platform. Sources: Australian Department of Foreign Affairs and Trade, n.d., https://www.dfat.gov.au/geo/united-states-of-america/united-states-of-america-country-brief; Australian Department of Defence, n.d., https://www.defence.gov.au/defence-activities/programs-initiatives/united-states-force-posture-initiatives
• IND · Partner: Official U.S.-India and Indian statements describe a comprehensive global strategic partnership. The relationship has no formal mutual-defense treaty. Sources: Ministry of External Affairs of India, 2025-01 to 2025-02, https://www.mea.gov.in/Portal/ForeignRelation/US_Bilateral_Brief_0125.pdf
• TWN · Exposed: U.S. ties are officially robust but unofficial, grounded in the Taiwan Relations Act rather than a defense treaty; Taiwan sits inside the lens as a contingency-shaping actor. Sources: American Institute in Taiwan, 1979 text; 2026 explanatory letters and policy pages, https://www.ait.org.tw/policy-history/taiwan-relations-act/
• CHN · Competitor: Recent U.S. Indo-Pacific posture documents explicitly prioritize deterrence against the PRC, making China the principal competitive reference point in this lens. Sources: U.S. Department of Defense Comptroller, 2025-06-12, https://comptroller.defense.gov/Portals/45/Documents/defbudget/FY2026/FY2026_Pacific_Deterrence_Initiative.pdf
• Washington, DC: Washington sets U.S. treaty policy, defense budgets, and regional force posture. Sources: U.S. Department of Defense, 2024-07-30, https://www.defense.gov/News/Releases/Release/Article/3854902/joint-statement-on-the-philippines-united-states-fourth-22-ministerial-dialogue/; U.S. Department of Defense Comptroller, 2025-06-12, https://comptroller.defense.gov/Portals/45/Documents/defbudget/FY2026/FY2026_Pacific_Deterrence_Initiative.pdf; Ministry of External Affairs of India, 2025-01 to 2025-02, https://www.mea.gov.in/Portal/ForeignRelation/US_Bilateral_Brief_0125.pdf
• Yokosuka: Yokosuka hosts the U.S. 7th Fleet and the Navy's only permanently forward-deployed carrier strike group. Sources: Commander, Navy Region Japan, n.d., https://cnrj.cnic.navy.mil/Installations/CFA-Yokosuka/Welcome-Aboard/
• Kadena Air Base: Kadena is a major U.S. air-power hub in the Pacific. Sources: U.S. Air Force, n.d., https://www.kadena.af.mil/
• Camp Humphreys: The largest overseas U.S. military installation anchors the Korean Peninsula portion of the alliance map. Sources: U.S. Army, n.d., https://home.army.mil/humphreys/
• Manila: Manila manages alliance diplomacy, VFA and EDCA implementation, and maritime-security coordination. Sources: Lawphil Project, Republic of the Philippines, 1951-08-30, https://lawphil.net/international/treaties/mutdef.html; U.S. Department of Defense, 2024-07-30, https://www.defense.gov/News/Releases/Release/Article/3854902/joint-statement-on-the-philippines-united-states-fourth-22-ministerial-dialogue/
• Darwin: Darwin hosts Marine Rotational Force-Darwin and sits inside the U.S. Force Posture Initiatives as a recurring alliance platform. Sources: Australian Department of Defence, n.d., https://www.defence.gov.au/defence-activities/programs-initiatives/united-states-force-posture-initiatives
• Andersen AFB and Joint Region Marianas: Guam supports Indo-Pacific power projection and a more dispersed U.S. force posture. Sources: U.S. Air Force, n.d., https://www.andersen.af.mil/About-Us/Fact-Sheets/Display/Article/414606/36th-wing/
• Tokyo: Tokyo decides host-nation support, force modernization, and the politics of the bilateral alliance. Sources: Ministry of Foreign Affairs of Japan, n.d., https://www.mofa.go.jp/region/n-america/us/q%26a/ref/1.html; Ministry of Foreign Affairs of Japan, n.d., https://www.mofa.go.jp/region/n-america/us/q%26a/ref/2.html
• U.S.-Japan treaty and basing framework: A mutual-security treaty and basing agreements make Japan a core host for U.S. forces. Sources: Ministry of Foreign Affairs of Japan, n.d., https://www.mofa.go.jp/region/n-america/us/q%26a/ref/1.html; Ministry of Foreign Affairs of Japan, n.d., https://www.mofa.go.jp/region/n-america/us/q%26a/ref/2.html
• U.S.-ROK mutual defense and basing: The U.S.-ROK treaty supports the continued stationing of U.S. land, air, and sea forces in South Korea. Sources: Avalon Project, Yale Law School, 1953-10-01, https://avalon.law.yale.edu/20th_century/kor001.asp; U.S. Army, n.d., https://home.army.mil/humphreys/
• U.S.-Philippines MDT plus EDCA access: The 1951 treaty and EDCA give U.S. forces access to Philippine sites and support joint operations. Sources: Lawphil Project, Republic of the Philippines, 1951-08-30, https://lawphil.net/international/treaties/mutdef.html; U.S. Department of Defense, 2024-07-30, https://www.defense.gov/News/Releases/Release/Article/3854902/joint-statement-on-the-philippines-united-states-fourth-22-ministerial-dialogue/
• U.S. rotational posture through Darwin: Darwin provides recurring rotational access. It does not have the status of a permanent treaty base like those in Japan or South Korea. Sources: Australian Department of Foreign Affairs and Trade, n.d., https://www.dfat.gov.au/geo/united-states-of-america/united-states-of-america-country-brief; Australian Department of Defence, n.d., https://www.defence.gov.au/defence-activities/programs-initiatives/united-states-force-posture-initiatives
• Guam to forward alliance arc: Guam and Japan form linked nodes in a dispersed U.S. forward network, though their legal authorities and missions differ. Sources: U.S. Department of Defense Comptroller, 2025-06-12, https://comptroller.defense.gov/Portals/45/Documents/defbudget/FY2026/FY2026_Pacific_Deterrence_Initiative.pdf; U.S. Air Force, n.d., https://www.kadena.af.mil/; U.S. Air Force, n.d., https://www.andersen.af.mil/About-Us/Fact-Sheets/Display/Article/414606/36th-wing/