Five ways the US-Iran conflict is shifting - analysis

From the Strait of Hormuz to sanctions and diplomacy, the US-Iran conflict is broadening into a struggle that is reshaping regional security and the global balance of power.

The confrontation between the United States and Iran has entered a new phase. The military conflict that dominated headlines earlier this year is increasingly giving way to a broader contest of economic pressure, maritime security, diplomacy, and great-power competition. This is part of the changing world order, as the conflict accelerates new trends around the world.

The Trump administration has made it clear that it believes the next stage of the campaign will rely less on airstrikes and more on isolating Iran economically while maintaining military deterrence. Tehran, meanwhile, is seeking to mobilize its remaining allies and show it still has leverage.

Here are five ways the US-Iran conflict is changing.

1. The Strait of Hormuz may be shifting from a battlefield to a shipping corridor

One of the clearest signs of the transition came today, when President Donald Trump announced that the US Navy had successfully cleared naval mines from the Strait of Hormuz. "All mines have been removed and/or detonated from within the International Waters of the Strait of Hormuz," Trump wrote on Truth Social.

The message was about more than mines. It was intended to demonstrate that Washington intends to guarantee freedom of navigation despite months of Iranian attempts to disrupt maritime traffic. Trump also warned that Iran had been informed that any vessel attempting to lay additional mines would be "immediately and systematically destroyed." The US has backed freedom of navigation as policy since the Woodrow Wilson administration more than 100 years ago.

For decades, Iran has viewed the Strait of Hormuz as one of its strategic anchors. Around one-fifth of global oil shipments traditionally transited the waterway. The ability to threaten shipping has provided Tehran with leverage during periods of crisis. It did this in 2019, mining ships. The US objective now appears to be removing that leverage while reassuring global energy markets that international shipping can continue.

2. Economic pressure has become Washington's primary weapon. The Trump administration has also signaled that economic pressure will now become the centerpiece of US strategy

Treasury Secretary Scott Bessent announced the launch of Operation Economic Outcast, describing it as an unprecedented whole-of-government campaign to isolate Iran financially. "In the Second World War, D-Day marked the historic beginning of a campaign with our allies to target and drive the enemy from its positions," Bessent said. "Today, in that same spirit, we are launching an economic onslaught against Iran's financial connections around the globe."

The Treasury Department indicates it has mapped Iranian financial networks, oil smuggling operations, sanctions evasion mechanisms, and funding channels linked to the Islamic Revolutionary Guard Corps (IRGC). The goal is to sever what Washington describes as every remaining economic lifeline supporting the regime.

Unlike previous sanctions campaigns, this initiative appears designed as an open-ended global effort rather than a series of individual sanctions packages. Washington is also framing the campaign as a choice for third countries: align with the United States or risk becoming economically isolated alongside Iran. It remains to be seen if this will work.

3. China is slowly expressing its concern about the conflict as it inches its way into the region

The new American strategy immediately highlighted another reality: the growing importance of China. Beijing criticized the new sanctions, warning that they would "only further intensify tensions" and arguing that China's legitimate cooperation with Iran should not be disrupted. Chinese officials again opposed what they described as unilateral American sanctions. China has a 25-year economic deal with Iran. China also benefits from the US being tied up in fights with Iran.

Iranian officials have emphasized that China remains one of Tehran's most important partners. Economy Minister Ali Madanizadeh argued that both China and Russia have shown no indication that they intend to fully comply with Washington's new campaign.

This reflects a broader geopolitical competition. For years, Iran has looked eastward as relations with Western countries deteriorated. China has purchased Iranian oil, invested in infrastructure to a limited extent, and expanded political ties. Russia has likewise deepened military and strategic cooperation with Tehran. Iran expects more from China. China has shown it is cautious and pragmatic.

As a result, the US-Iran confrontation is becoming inseparable from wider competition among major powers as the world order shifts toward a multipolar world. The effectiveness of Operation Economic Outcast may depend not only on American enforcement but also on whether Beijing and Moscow decide to reduce their engagement with Tehran.

4. Iran is responding with economic measures and attempts at deterrence

Iran's response illustrates that Tehran increasingly views economic pressure as another form of warfare. Madanizadeh described the new sanctions as an "economic terrorist attack" and warned that Washington should "expect an attack" in response. "We know how to play the game too," he said during an interview broadcast on Iranian state television.

Although the precise meaning of those comments remains unclear, Iranian leaders have sought to respond to economic pressure through so-called asymmetric means. Previous periods of sanctions have coincided with responses that included cyber attacks, threats by Iranian-backed proxy groups, maritime attacks, and efforts to disrupt regional energy infrastructure. The fact that the US has been successful against mines may show Iran can’t control the tempo any longer.

5. Regional diplomacy is continuing alongside confrontation

Diplomacy has not evaporated. On August 25, Oman and Iran issued a joint statement following consultations between Omani Foreign Minister Sayyid Badr bin Hamad Albusaidi and Iranian Foreign Minister Abbas Araghchi. They posted about the new initiative on the social media platform X/Twitter.

The discussions focused on restoring safe navigation through the Strait of Hormuz while respecting sovereignty. Both governments said they discussed a phased framework that could provide a practical basis for moving forward following the recent conflict.

Oman has long played a key role in regional diplomacy. The Sultanate has maintained relations with both Washington and Tehran and has frequently served as a discreet channel for negotiations. Previous US-Iran nuclear talks also benefited from Omani mediation. This has led to US threats against Oman.

Iran is seeking to demonstrate resilience while preserving diplomatic options through partners such as Oman. Regional states are attempting to prevent another escalation that could once again threaten global energy markets. Oman’s outreach follows Pakistani officials' visit to Tehran.