U.S. President Donald Trump's remarks on the 20th (local time) are interpreted not just as an update on military operations, but as a message revealing the direction of the post-war international order. 

On the surface, he mentioned the possibility of a phased withdrawal along with an assessment that the goals of the military operation against Iran were nearing completion. However, in reality, the remarks strongly indicated how the security structure would be reshaped afterward.

President Trump stated that the goal of neutralizing Iran's missile capabilities and defense industry base was entering its final stages. Simultaneously, regarding the defense of the Strait of Hormuz, he said, "The countries that use it must take responsibility, and the United States will not play that role." 

These remarks go beyond explaining the scope of military operations and can be seen as a clear indication of a shift in the role the United States has traditionally played.

Up until now, the United States has virtually acted as a 'protector' in the international security order, including major maritime transit routes. This structure involved direct intervention in conflict zones and military guarantees of allies' security. However, this recent statement suggests that this approach may no longer be sustainable.

The direction the United States is choosing is closer to a redeployment of roles rather than a complete withdrawal. 

It involves maintaining military intervention capabilities and strategic control while sharing the execution and cost burden on the ground with allies and user nations. This aligns with a conceptual shift from viewing alliances as entities to be protected to viewing them as active participants in fulfilling roles.

This change is not sudden.

President Trump has repeatedly called for increased defense cost-sharing and enhanced military roles from allies in the past. U.S. defense strategy documents and annual threat assessments have consistently emphasized the need for expanded allied contributions and regional burden-sharing.

The recent remarks regarding the Strait of Hormuz can be seen as a concrete example of this trend materializing into actual policy. The Strait of Hormuz is particularly symbolic as a critical passage for global energy transport.

The announcement of a policy to distribute responsibilities in a region that the United States has historically guaranteed safety signifies a change at the core of the international order.

The essence of this change lies not in military power itself, but in the structure of costs and responsibilities.

The burden required to maintain the international order is no longer solely borne by the United States but is transitioning to a model where allies and user nations share it. 

This is interpreted as a process of transforming alliance relations from 'protection and dependence' to a structure of 'sharing and responsibility.' 

It is highly likely that this trend will not be confined to the Middle East. 

Predictions suggest that similar demands for role-sharing may arise in the Indo-Pacific region in the future, particularly in the Taiwan Strait. 

The Taiwan Strait is a region where semiconductor supply chains, maritime logistics, and U.S.-China strategic competition converge, making its importance comparable to that of the Middle East. South Korea is also not immune to these changes. 

The Strait of Hormuz is directly linked to energy imports, and the Taiwan Strait is connected to semiconductors, export structures, and maritime routes. As both regions are closely tied to the core of the Korean economy, these are issues with tangible interests beyond mere diplomatic matters.

Ultimately, the question posed by these remarks is clear. 

In a situation where the United States is moving towards a structure that maintains control while dispersing responsibility, each allied nation will be required to make judgments on the extent to which they will fulfill their roles. 

President Trump's message this time is not a sign of the U.S. stepping back, but rather a formal declaration of his intent to change the operational method of the international order.

The Strait of Hormuz is merely the point where that change first became apparent, and this trend is highly likely to expand to other regions. The United States is not withdrawing; it is redesigning the structure of responsibility.

There is growing interest in how the Lee Jae-myung administration will respond to these changes.