Dynamic Equilibrium as Indonesia’s Defense Diplomacy Geo-Strategy to Address China-Us Sphere Of Influence Dualism in ASEAN

: Global strategic environment dynamics is inevitably correlated to foreign policy addressed by super power states. Based on economic and political view, CHINA-USA dualism sphere of influence in ASEAN has different dimensions. Re-balancing Asia in Obama’s administration and Indo-pacific Quad-lateral strategy of Trump’s administration are strategies of United States for containing Chinas political influence in Indo-pacific. United States foreign policy cannot be separated from Chinas rising political influence through Belt And Road Initiatives Mega Project in ASEAN. ASEAN Centrality weakness is a threat. As a result of different national interests in ASEAN such as defense alliances and development acceleration interests in several ASEAN states, readdressing ASEAN Centrality is imperative that Indonesia asserts ASEAN identity to be apart of external influences (Major Powers). This challenge could be seen from Dynamic Equilibrium view as a doctrine that has geo-strategy character in its implementation. Marty Natalegawa asserts that Dynamic Equilibrium is geo-strategic balancer to Major Power State’s geopolitics influence in ASEAN. Through qualitative approach, this paper aims to describe a new free-active foreign policy model by Marty Natalegawa through Dynamic Equilibrium doctrine. A geostrategy model rendered of Dynamic Equilibrium doctrine for a writer has required a more advance study and development through deep research. Therefore Dynamic Equilibrium can be a unique In-donesian School Of Thought in Indonesia’s Defense Diplomacy Geo-strategy. Finally, this paper will be its introduction.