應對中共擴張：日美同盟重返戰後地緣政治框架 雲程 HoonTing

Countering Beijing's Expansion: The US-Japan Alliance's Return to Post-War Geopolitical Alignment    HoonTing 20250702

Geopolitics is fundamentally shaped not only by geographic factors but also by political elements, such as national borders and governing systems. Consequently, geopolitical shifts tend to occur gradually. Since the Korean War, Asia—apart from Indochina, or more precisely, the unification of North and South Vietnam—has experienced minimal changes in geographic boundaries and political systems. This has resulted in relatively constrained shifts in geostrategic dynamics.

On June 25, 1950, the Korean War erupted, and just two days later, on June 27, the U.S. Joint Chiefs of Staff submitted a report to the White House, asserting that the recent conflicts—namely, the First Indochina War (commencing in 1946), the Kinmen Crisis (the 1949 Battle of Guningtou), and the Korean War—represented different flanks of "Chinese communization." Thus, these seemingly disparate conflicts should be viewed as a singular event, driven by the Chinese Communist Party’s expansionist ambitions toward neighboring Asian states.
Over the past eight decades, international political and strategic paradigms have evolved, transitioning from the Cold War to a policy of engaging China to counter Russia, and later encouraging China’s reform and integration into the global system. However, contemporary international dynamics have reverted to the foundational elements of geography and borders, with the U.S. military reorienting its strategic focus toward the Chinese Communist Party. Previously fragmented defense lines and bases, established through individual treaties, have now been integrated into a cohesive "single theater" framework.
In recent years, adjustments such as the transfer of wartime operational control in the U.S.-South Korea alliance, the downgrading of the U.S. Forces Korea commander’s rank, and the elevation of the U.S. Forces Japan commander’s rank have perplexed observers. These changes, however, constitute refinements within the forward-deployed and headquarters structures. To this end, the military has recalibrated command hierarchies: the Indo-Pacific Command retains its four-star general status, the U.S. Forces Japan commander has been elevated from a three-star lieutenant general to a four-star general, and the U.S. Forces Korea commander has been downgraded from a four-star general to a two-star major general. This realignment subordinates the U.S. Forces Korea region to U.S. Forces Japan, positioning the latter on par with the Indo-Pacific Command to enhance rapid response and independent operational capabilities. Concurrently, in response to China’s military buildup in the South China Sea, the forward role once played by U.S. forces in Vietnam during the Korean War has now shifted to the Philippines region.

These strategic adjustments have extended the depth of the defense line, establishing a multi-layered framework encompassing forward positions, main forces, rear guards, and support elements—at least four strategic echelons—enabling flexible tactical suppression of adversaries. The central thrust of U.S. military adjustments in recent years remains deterrence, aimed at conveying to Xi Jinping that the current moment is inopportune for military action, necessitating further caution and observation.

應對中共擴張：日美同盟重返戰後地緣政治框架    雲程 20250702

地緣政治的核心不僅在於地理因素，政治因素如國界與體制同樣至關重要。因此，地緣政治的變遷通常緩慢。自韓戰以來，亞洲地區除了印度支那——更具體而言是南北越統一——之外，地理疆界幾乎未變，政治體制也鮮有更動。這使得地緣戰略的變動幅度相對有限。
1950年6月25日韓戰爆發，僅兩天後的6月27日，美國參謀長聯席會議向白宮提交報告指出，近期發生的越戰（1946年起的第一次印度支那戰爭）、金門危機（1949年古寧頭戰役）以及韓戰，均為「中國赤化」不同側翼的表現。因此，這些看似獨立的戰事應視為單一事件，其背後的主導力量無疑是中共對亞洲鄰國的擴張企圖。
在長達八十年的國際政治與戰略演變中，理論觀點經歷了從冷戰到聯中制俄，再到鼓勵中國改革開放融入世界的轉變。然而，時至今日，國際局勢又回歸到最基本的地理與國界因素，美軍的戰略焦點重新鎖定中共。過去以個別條約零散構築的防線與基地，如今已整合為「統一戰區」的有機整體。
近幾年，外界對美韓聯軍戰時指揮權移轉、駐韓美軍司令降階以及駐日美軍司令位階提升等調整頗感困惑。這些變動實則是在前沿與總部架構下的末端調整。為此，軍方重新配置司令位階：印太司令部維持四星上將，駐日美軍司令從三星中將升至四星上將，駐韓美軍司令則從四星上將降為二星中將。這意味著駐韓美軍區域納入駐日美軍節制，駐日美軍地位與印太司令部平級，以提升即時反應與獨立作戰能力。同時，因應中國在南海的軍事建置，韓戰時期由駐越南美軍承擔的前沿角色，如今轉由菲律賓區域承接。
這樣的戰略調整拉長了防線縱深，形成前沿、主力、後衛及支援至少四層次的戰略布局，能靈活運用戰術壓制敵方。這幾年美軍的調整主軸仍是嚇阻，目的在讓習近平意識到：當下並非動武的適當時機，需再謹慎觀望。

為一個目標，東亞戰略已經全數整合為一個戰區
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