美國印尼「主要防衛合作夥伴關係」的地緣戰略影響 Geostrategic Implications of the U.S.–Indonesia “Major Defense Cooperation Partnership”

【雙魚之論】
〈美印尼主要防衛合作夥伴關係（MDCP）成立聯合聲明〉
赫格塞斯與印尼方面宣佈建立國防合作夥伴關係 戰爭部 20260415
美國印尼「主要防衛合作夥伴關係」的地緣戰略影響　Geostrategic Implications of the U.S.–Indonesia “Major Defense Cooperation Partnership”

Singapore’s heightened anxiety over the blockade of the Strait of Hormuz appears, on the surface, to stem from developments in the Middle East. In reality, it reflects deeper strategic concerns about a potential conflict in the Taiwan Strait. In this sense, the Hormuz episode functions as a “rehearsal,” exposing Singapore’s vulnerability in the event of great-power confrontation.

Lessons drawn from blockade and counter-blockade dynamics at Hormuz suggest that, should conflict erupt in the Taiwan Strait, the United States and China would inevitably extend their strategies to key maritime chokepoints. Among these, the Strait of Malacca would become a critical node. For Singapore, whose economy is heavily dependent on maritime trade, any disruption would immediately strike at its economic lifeline.
For China, a blockade of the Strait of Malacca would force maritime traffic to reroute through the Lombok and Sunda Straits or even more distant alternatives. However, these routes have increasingly come under the influence of growing U.S.–Indonesia military cooperation, reducing their security and reliability. Under such constraints, a more viable alternative for China would be to project outward from its artificial islands in the South China Sea, passing through the Sulu and Celebes Seas. This route largely overlaps with the Imperial Japanese Navy’s southward advance during World War II—terrain with which U.S. forces are highly familiar—making it far from risk-free.
Viewed in this context, China’s large-scale land reclamation and military deployment in the South China Sea are fundamentally aimed at reshaping regional control and fragmenting the operational space of the U.S. Seventh Fleet. If successful, mainland Southeast Asian states could gradually fall within China’s sphere of influence, altering the regional balance of power. In such a scenario, Thailand’s long-discussed Kra Isthmus Canal project would gain renewed feasibility as an alternative solution to China’s “Malacca dilemma.”
In sum, the Nine-Dash Line and the militarization of artificial islands in the South China Sea are not merely matters of sovereignty disputes; they have already transformed the regional security architecture and triggered a chain of strategic reactions. Neighboring countries are not without options, but are proceeding cautiously, building consensus and preparing over time.
As the United States shifts from political signaling to concrete action, East Asian allies will respond with greater clarity and coordination. Singapore’s sensitivity is thus an early indicator of this broader structural shift.

新加坡對荷姆茲海峽封鎖事件的高度緊張，表面源於中東局勢，實際反映對台海潛在衝突的戰略焦慮。換言之，荷姆茲事件是一種「預演」，使其看見自身在大國衝突中的脆弱性。
由荷姆茲海峽封鎖與反封鎖經驗可推知，一旦台海爆發戰爭，美中勢必將戰略延伸至海上交通要道，其中麻六甲海峽將成為關鍵節點。對高度依賴航運的新加坡而言，一旦受阻，經濟命脈將立即遭受衝擊。
對中國而言，若麻六甲被封鎖，中國航運必然改道龍目、巽他海峽或更遠路線，但這些航道近年已受美國與印尼軍事合作牽制，安全性下降。在此情況下，中國較可行的替代路徑，是由南海人造島出發，經蘇祿海與西里伯斯海突破。該路線與二戰日軍南進路徑重合，美軍極為熟悉，風險仍高。
回頭觀察中國在南海造島與部署，其核心在於重塑區域控制並切割美軍第七艦隊行動空間。一旦成功，中南半島國家可能逐步納入其影響範圍，區域權力結構改變。屆時，泰國克拉地峽運河計畫亦將更具推進條件，成為突破「麻六甲困境」的替代方案。
總體而言，九段線與南海造島不僅涉及主權爭議，更已改變區域安全結構並引發連鎖反應。周邊國家並非無策，而是在審慎中累積共識與準備。
當美國由政治宣示轉向實際行動時，東亞盟國將更明確配合。新加坡的敏感反應，正是此一結構變化的前兆。

美國印尼軍事同盟    金天光 20260415

１．打通「兩洋」走廊：美國在印太地區有兩個核心支點：西太平洋的關島 (Guam) 與印度洋的迪亞哥加西亞 (Diego Garcia)。
過去：若無印尼許可，美軍軍機必須繞道澳洲北部或菲律賓，航程增加數千公里。
協議：印尼領空提供了最直接的「直線路徑」，讓轟炸機、加油機與運輸機能在兩洋之間快速調動 [1, 2]。

２：監控「馬六甲困境」的制高點：印尼掌控著馬六甲海峽、巽他海峽與龍目海峽。這三處是全球最繁忙的海上咽喉，也是中國能源進口的「生命線」。擁有印尼領空進入權，美軍的偵察機（如 P-8A 獵戶座）可以更頻繁、更持久地從印尼上空監控這些通道，增強對潛艦與水面艦艇的打擊與封鎖能力 [3, 5]。

３．支撐「第一島鏈」南翼：印尼位於第一島鏈的最南端。隨著美國加強與菲律賓的軍事合作，若再加上印尼的領空進入權，美軍將在南海周邊形成一個半圓形的「監視弧」，直接投射力量至納土納群島 (Natuna Islands) 附近，應對南海衝突 [2, 4]。

４．分散部署 (ACE) 戰略：美軍正推行「敏捷戰鬥部署」(Agile Combat Employment)，即不依賴大型固定基地，而是將戰機分散到多個小型機場。印尼廣闊的島嶼與領空，為美軍提供了極大的戰略縱深，使其在戰時更難被鎖定 [3]。