The United States cannot expect its allies to assume the risks of a crisis it has largely shaped, nor can it redefine alliance obligations to fit the needs of a single policy moment. Yet these concerns have resurfaced in Washington’s call for military participation in securing the Strait of Hormuz amid heightened tensions with Iran.

Protecting a vital global shipping route is, in principle, a shared interest. But principle alone cannot determine policy. The current situation has developed through a sequence of decisions that has narrowed diplomatic options while increasing the likelihood of confrontation. Under such conditions, calls for immediate burden-sharing appear less like a collective strategy and more like an effort to distribute the consequences of escalation.

Recent international responses underscore this reality. Several European Union member states have declined to participate, citing the absence of a clear mandate and the need for de-escalation. China has maintained a cautious distance. South Korea, despite its close alliance with Washington, has likewise approached the proposal with restraint. These responses are not signs of indifference to global security, but indicate that the current approach lacks sufficient consensus and clarity.

At the center of the issue is a question of responsibility. While tensions between the United States and Iran have deep historical roots, recent developments have been significantly shaped by policy choices that prioritized pressure over diplomacy. It is therefore reasonable for allies to ask whether military participation at this stage serves a clearly defined and logical objective, or whether it risks aggravating an already volatile situation.

Compounding these concerns is the unpredictability of U.S. policy signaling. Under the leadership of Donald Trump, statements regarding security commitments and strategic priorities have been inconsistent, including abrupt reversals on sensitive geopolitical issues. References to alliance assets, such as the United States Forces Korea (USFK), have occasionally been invoked in ways that blur their intended purpose. Such rhetoric risks creating uncertainty among allies, particularly when figures and commitments are cited without clear strategic context or are later walked back. In matters of security, where credibility and consistency are essential, these patterns can erode confidence rather than reinforce it.

Equally important is the manner in which expectations are framed. Existing security arrangements, including the role of USFK, are specifically designed to maintain stability on the Korean Peninsula. Extending their relevance to a separate regional contingency risks diluting their purpose and weakening the clarity upon which alliance commitments depend.

The strategic environment in the Strait of Hormuz further reinforces the need for caution. This is a region where even limited military deployments can trigger rapid escalation through miscalculation. Maritime security operations may contribute to stability, but only if they are embedded within a broader framework that gives equal weight to diplomatic engagement. Absent such balance, they may have the opposite effect.

For South Korea, the considerations are particularly delicate. The country depends on secure energy supplies that pass through the Strait of Hormuz, yet its primary security responsibility remains focused on the Korean Peninsula. Any decision to participate in operations far from its immediate region must therefore be grounded in a careful assessment of both necessity and risk.

Alliances function best when guided by a shared purpose, not shaped by shifting expectations. Requests for cooperation carry greater legitimacy when supported by clear objectives, legal grounding and sustained consultation. When these elements are lacking, hesitation from partners is both predictable and justified.

The present situation calls for recalibration. A strategy that places diplomacy alongside security measures and consensus alongside capability would offer a more durable path forward. The strength of alliances lies not in their ability to respond reflexively to every request, but in their capacity to act together when the basis for action is clear and mutually accepted.

In the end, the credibility of any collective effort depends on whether it reflects a genuinely shared judgment. Without that foundation, even well-intentioned initiatives risk falling short of their aims.

The author is chief editorial writer of The Korea Times.

© The Korea Times