US President Donald Trump has maintained that the ongoing military campaign against Iran is necessary to prevent a greater security threat, expressing confidence that the conflict would end soon.

Trump made the remarks on Wednesday, during a Veterans Day ceremony at Arlington National Cemetery in Virginia, where he addressed American military personnel, veterans and senior government officials.

“When this conflict is over, and it will be soon, the entire world will be a much safer and better place, more peaceful place, and a place without the kind of danger that we had to suffer,” Trump said as quoted by Channels Television.

He argued that Iran had posed a threat to the United States for decades, insisting that Washington did not initiate the confrontation. He also maintained that the military operation was aimed at preventing Tehran from acquiring nuclear weapons.

At the ceremony, Trump praised American troops for their performance in the war and described their military capabilities as exceptional.

The event also attracted attention after an Army sentinel cautioned Defence Secretary Pete Hegseth, his wife and members of his entourage over their conduct near the Tomb of the Unknown Soldier. The guard reminded the group of the requirement to maintain silence and respect at the memorial site after some members reportedly laughed while posing for photographs.

Hegseth, whom Trump publicly praised during the address, is also facing political controversy over allegations that he authorised military action without congressional approval. An attempt by a Republican lawmaker to impeach him was blocked by members of the party in the House of Representatives on Tuesday.

Meanwhile, Trump used the occasion to revisit his proposed 250-foot triumphal arch near Arlington National Cemetery, saying the project would be dedicated soon. However, the proposed structure is facing legal challenges from the family of former President John F. Kennedy, veterans’ groups, Washington authorities and the state of Virginia.