WASHINGTON — US Undersecretary of Defense for Policy Elbridge Colby concluded a four-nation tour of Southeast Asia on Monday, emphasizing a shift toward "partners, not protectorates" in regional security cooperation. Colby’s visit to Manila, Jakarta, Bangkok, and Phnom Penh followed repeated assurances that the United States remains committed to the Indo-Pacific despite global conflicts.
Colby outlined a "denial defense" strategy aimed at deterring aggression by positioning sufficient military capability to make attacks difficult to execute, rather than relying solely on retaliatory threats. He described this as part of a broader effort to build "a fully operational, resilient architecture of denial defense" along the First Island Chain—an arc of islands stretching from Japan through Taiwan, the Philippines, and Borneo.
Colby’s remarks in Manila marked the start of his first official trip to Southeast Asia as Pentagon policy chief. He stated that "America is definitely not disengaging from Asia", countering concerns about US reliability amid simultaneous conflicts in the Middle East. His tour included meetings with defense officials, diplomats, and business leaders to discuss burden-sharing and regional security investments.
Key elements of the strategy, as detailed by Colby, include:
- Expanding forward military posture in the Indo-Pacific.
- Accelerating delivery of combat capabilities to regional allies.
- Building infrastructure to sustain denial defense operations.
- Prepositioning military assets to enhance deterrence.
Colby repeatedly stressed that regional allies must invest more in their own defense to strengthen collective deterrence. He framed this as a move away from dependency, stating: "We are looking for partners, not protectorates." The Pentagon’s approach prioritizes practical defense cooperation over ideological alignment, according to Colby.
No direct references to China or the South China Sea were made during Colby’s Manila speech, despite recent tensions involving Scarborough Shoal and disputed maritime claims. His measured tone preceded an anticipated meeting between US President Donald Trump and Chinese leader Xi Jinping, where regional security is expected to be a key topic.
Context and background
The First Island Chain has long been central to US and allied military planning, particularly in countering Beijing’s expanding influence in the western Pacific. Colby’s strategy aligns with broader US efforts to maintain a favorable balance of power in the region, even as Washington reallocates resources amid global conflicts.
Reactions and implications
While Colby’s tour focused on diplomatic reassurance, the absence of explicit mentions of China or specific disputes raised questions among analysts. Some observers noted that the "flexible realism" approach—prioritizing practical cooperation over ideological alignment—could signal a more pragmatic US engagement model in Asia.
The Pentagon’s push for greater burden-sharing reflects a longstanding US goal to reduce its sole responsibility for regional security. Colby’s emphasis on "partners, not protectorates" underscores this shift, though the practical implementation remains under discussion with regional governments.