Why the timeline of US war with Iran keeps shifting

Smoke billows from the site of an Israeli airstrike that targeted the Hadath Lailaky neighbourhood in Beirut’s southern suburbs. (Courtesy: AFP photo)

The United States and Israel launched strikes on Iran on February 28, opening what has quickly become a widening military campaign across the region. In the early days of the operation, US President Donald Trump suggested the conflict would be relatively brief.

In an interview the day after the first strikes, Trump said the military campaign could last “four to five weeks.” He also indicated that the operation would not be particularly difficult. At the same time, however, he did not clearly define what outcome would be considered a successful end to the war.

That uncertainty has remained a theme throughout the first eleven days of the conflict, the New York Times reported.

Different messages from the administration

Since the start of the war, officials in the Trump administration have given a range of estimates about how long the operation might continue.

US Defense Secretary Pete Hegseth told reporters that the campaign was not intended to resemble the long US military interventions in Iraq or Afghanistan. He said the operation could last anywhere between two and eight weeks, though he stopped short of committing to a specific timeframe.

General Dan Caine, chairman of the US Joint Chiefs of Staff, also emphasised that the campaign would not be a quick, single strike. He warned that achieving military objectives inside Iran would take time and that the United States should expect additional casualties.

Trump himself has alternated between suggesting the campaign is progressing quickly and leaving open the possibility that it could continue much longer if needed.

Shifting goals for the war

Beyond the timeline, the stated goals of the war have also appeared to shift.

At different moments, the administration has described the objective as weakening Iran’s military, forcing Tehran to surrender or even fundamentally reshaping Iran’s government. On March 6, Trump wrote on social media that there would be no deal with Iran except “unconditional surrender.”

Yet later that same day, White House press secretary Karoline Leavitt suggested that surrender did not necessarily mean a formal declaration from Iran. Instead, she said it could simply mean that the president believes US objectives have been achieved.

Signs of uncertainty about the endgame

As the war entered its second week, Trump continued to offer mixed signals about when it might end.

After attending a ceremony honouring American troops killed during the conflict, he described the campaign as a “short excursion” and said the United States was winning decisively. Days later he told CBS News that the war was already “very complete, pretty much.”

But in other remarks to Republican lawmakers, he spoke about achieving an “ultimate victory” that would eliminate the threat from Iran entirely, suggesting broader goals that could extend the conflict.

The decision ultimately rests with Trump

Administration officials have repeatedly said that the timeline of the war will ultimately depend on the president.

Defense Secretary Hegseth said Trump “controls the throttle” of the military campaign and will decide how long it continues. White House officials have echoed that message, saying Trump will determine when Iran no longer poses what he considers a credible threat.

For now, that means the war’s end remains uncertain, even as fighting continues across the region.