The U.S. military resumed airstrikes against Iran on Sunday, prompting the Iranian military to announce a full closure of the Strait of Hormuz [1].

This escalation threatens one of the world's most critical oil transit chokepoints, risking a global energy crisis and a wider regional conflict between two nuclear-capable powers.

U.S. Central Command initiated the strikes after a container ship flying the flag of Cyprus was targeted in an attack [1]. This marks the third time the U.S. has conducted airstrikes against Iran since the two nations signed a ceasefire memorandum of understanding [1].

In response to the military action, the Iranian military said that the Strait of Hormuz would remain completely closed until further notice [1]. The strait is a narrow waterway connecting the Persian Gulf with the Gulf of Oman, and the Arabian Sea.

Analysts, including Baek Seung-hoon, a research fellow at the Hankuk University of Foreign Studies Middle East Institute, are monitoring the situation as the ceasefire agreement continues to fracture [1]. The decision to shut the strait serves as a direct countermeasure to the U.S. aerial campaign.

The U.S. has not yet issued a formal response to the closure of the waterway, though the strikes were carried out specifically to address the aggression against the Cypriot vessel [1].

Iran’s military said that the Strait of Hormuz would remain completely closed until further notice.

The closure of the Strait of Hormuz is a high-stakes geopolitical move that leverages global energy dependency. Because a significant portion of the world's petroleum passes through this narrow corridor, Iran's decision to block traffic in response to U.S. airstrikes could lead to immediate spikes in global oil prices and disrupt international shipping lanes, effectively turning a bilateral military dispute into a global economic shock.