'We will use force': US puts defiant ships on notice in Hormuz as Iran ceasefire frays

Hegseth framed the blockade operation as effective while reiterating that Washington preferred diplomacy but would act if deterrence failed
Defense Secretary Pete Hegseth and Chairman of the Joint Chiefs of Staff Gen Dan Caine speaks to members of the media during a press briefing at the Pentagon, Thursday, April 16, 2026 in Washington (AP Photo/Kevin Wolf)
Defense Secretary Pete Hegseth and Chairman of the Joint Chiefs of Staff Gen Dan Caine speaks to members of the media during a press briefing at the Pentagon, Thursday, April 16, 2026 in Washington (AP Photo/Kevin Wolf)

WASHINGTON, DC: The United States has warned it will use force against any vessels defying its naval blockade in the Strait of Hormuz, even as a fragile ceasefire with Iran enters its second week.

Chairman of the Joint Chiefs of Staff Gen Dan Caine issued the blunt warning during a news conference on Thursday, April 16, saying, “If you do not comply with the blockade, we will use force.”

Defense Secretary Pete Hegseth reinforced the message, stating that US forces remain fully prepared to escalate if required.

Defense Secretary Pete Hegseth takes questions from the media during a press briefing at the Pentagon, Thursday, April 16, 2026 in Washington. (AP Photo/Kevin Wolf)
Defense Secretary Pete Hegseth takes questions from the media during a press briefing at the Pentagon, Thursday, April 16, 2026 in Washington (AP Photo/Kevin Wolf)

Military ready for rapid escalation

Hegseth described the blockade as “successful” and said the military could swiftly transition back to full-scale combat operations if tensions rise again.

“At the direction of President Donald Trump, the War Department will ensure that Iran never has a nuclear weapon,” Hegseth said, adding that Washington prefers a diplomatic resolution but remains prepared for a military option.

Caine echoed the stance, noting that US joint forces are “postured and ready to resume major combat operations at literally a moment’s notice.”

Chairman of the Joint Chiefs of Staff Gen. Dan Caine walks past Defense Secretary Pete Hegseth, left, at the start of a press briefing at the Pentagon, Thursday, April 16, 2026 in Washington. (AP Photo/Kevin Wolf)
Chairman of the Joint Chiefs of Staff Gen Dan Caine walks past Defense Secretary Pete Hegseth, left, at the start of a press briefing at the Pentagon, Thursday, April 16, 2026, in Washington (AP Photo/Kevin Wolf)

Ships turn back amid enforcement

According to Caine, at least 13 ships have already turned around rather than challenge the blockade, which applies to all vessels heading to or from Iranian ports regardless of nationality.

So far, US Central Command (CENTCOM) has not boarded any ships, indicating compliance has largely been voluntary under the threat of force.

The blockade, enforced in the Gulf of Oman just outside the Strait of Hormuz, comes as Iran attempts to assert control over the critical waterway, which typically carries about one-fifth of global oil shipments.

Iran has responded with sharp rhetoric, threatening to target American vessels and potentially disrupt traffic in other key waterways, including the Red Sea.

Shipping activity through the Strait of Hormuz remains significantly below pre-war levels despite the ceasefire, reflecting ongoing uncertainty and risk.

U.S. Vice President JD Vance, center, walks with Pakistan's Chief of Defence Forces and Chief of Army Staff Field Marshall Asim Munir, left, and Pakistani Deputy Prime Minister and Foreign Minister Mohammad Ishaq Dar after arriving for talks with Iranian officials in Islamabad, Pakistan, Saturday, April 11, 2026. (AP Photo/Jacquelyn Martin, Pool)
Vice President JD Vance walks with Pakistan's Chief of Defence Forces and Chief of Army Staff Field Marshal Asim Munir, left, and Pakistani Deputy Prime Minister and Foreign Minister Mohammad Ishaq Dar after arriving for talks with Iranian officials in Islamabad, Pakistan, Saturday, April 11, 2026 (AP Photo/Jacquelyn Martin, Pool)

Ceasefire talks show limited progress

The developments come just over a week into a two-week ceasefire aimed at creating space for negotiations to end the conflict.

Talks between US and Iranian officials in Pakistan last weekend failed to produce a breakthrough, with major disagreements persisting over Tehran’s nuclear program.

However, President Trump has indicated that another round of discussions could take place soon.

U.S. President Donald Trump arrives for a Medal of Honor Ceremony in the East Room of the White House on March 02, 2026 in Washington, DC. Trump awarded three soldiers the highest military decoration; Master Sgt. Roddie Edmonds, who died in 1985, for shielding Jewish prisoners from Nazi guards during World War II; then-Staff Sgt. Terry Richardson for saving 85 lives of fellow soldiers during the Vietnam War; and Staff Sgt. Michael Ollis who died in the Afghanistan War when he shielded another soldier from a suicide bomber. (Photo by Andrew Harnik/Getty Images)
President Donald Trump arrives for a Medal of Honor Ceremony in the East Room of the White House on March 02, 2026, in Washington, DC (Andrew Harnik/Getty Images)

Trump signals optimism and criticizes NATO

Despite the tensions, Trump has struck an optimistic tone, saying the conflict is “very close to over” and hinting at renewed diplomatic engagement.

At the same time, he has criticized NATO for its lack of involvement in the conflict, even raising the possibility of the US reconsidering its role in the alliance.

As the ceasefire deadline approaches, uncertainty remains over whether diplomacy will prevail or the region will slide back into open conflict.

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