The United States under Donald Trump has become a rogue warrior state. One needn’t be a supporter of the misnamed Islamic government of Iran to condemn the Trump-Israeli catastrophic regime change aggression against Iran in violation of the U.S. constitution and the popular will of the U.S. people who did not want yet another war.

To attack another nation in the midst of what were described by the Omani mediators as well as Iranian negotiators as making significant progress, is widely understood to be yet another US violation of international law. This underlines the reality that no nation can trust that United States, and this will have long term implications for the United States.

As anticipated, fearing for its survival, Teheran has retaliated with missile strikes against nations across the region which host US bases and Israel, as well as against the U.S. armada. We face the danger of an ever-widening war with global economic, as well as region-wide humanitarian and military implications. And, with no unified and coherent opposition force in Iran, decapitation of the ayatollahs’ government will likely result in devastating chaos. (Remember Iraq after the toppling of Saddam Hussein?)

With a lawless autocrat in power in Washington, we must do all that we nonviolently can to end the war and to defend U.S. constitutional democracy.

Rather than issue yet another statement, following are those of Antonio Guterres, U.N. Secretary General, the International Peace Bureau, and the U.S. Arms Control Association.

1. UN Secretary General António Guterres condemned the US-Israel military action and Iran’s response.

In a statement, he said:

I call for an immediate cessation of hostilities and de-escalation. Failing to do so risks a wider regional conflict with grave consequences for civilians and regional stability. I strongly encourage all parties to return immediately to the negotiating table.

I reiterate that there is no viable alternative to the peaceful settlement of international disputes, in full accordance with international law, including the UN charter. The charter provides the foundation for the maintenance of international peace and security.

2. IPB Condemns US and Israeli Attacks on Iran Calls for an Immediate Return to Negotiations

The International Peace Bureau (IPB) strongly condemns the US and Israeli attacks on Iran and the reported plans for a “multi-day operation”. The strikes on Iran, which are reportedly aimed at regime change through the decapitation of the political elite of the country – including attacks on military compounds and ministries – constitute a grave violation of international law and are reminiscent of the US’ disastrous war two decades ago in Iraq. We remain deeply concerned with the escalation of the crisis as Iran retaliates and more US and Israeli military actions are pending.

For the second year in a row, the US and Israel have attacked Iran during negotiation processes on nuclear limitations, raising questions and doubts over its true intentions in negotiations and diplomacy. We state clearly: negotiations are the only way to truly reduce regional tensions and find peaceful resolutions to longstanding conflicts. Military actions will only exacerbate the situation and risk throwing the wider region into deeper chaos, destruction, and devastation. They will not bring about the stated goals of the US and Israel and risk encouraging nuclear weapon development in Iran, adding to the risks already posed by Israeli nuclear weapons. Therefore, we implore an immediate ceasefire from all parties and a return to diplomatic discussions.

We remain deeply concerned with civilians in Iran, Israel and the greater region who suffer the most during this war. We acknowledge that war and destruction will not pave the path to a brighter future for the region or improved relations between nations and peoples – only diplomacy, dialogue, and common security and do so. We call on peace loving people around the world to protest against the aggression of the US and Israel and for world leaders to intervene to stop this war immediately.

3.STATEMENT: Illegal U.S.-Israel Attacks Not Justifiable on Nonproliferation Grounds

February 28, 2026

Issued By: Daryl G. Kimball, Executive Director, Thomas Countryman, Chair of the Board of Directors, and Kelsey Davenport, Director for Nonproliferation Policy

President Trump’s premeditated, illegal attack on Iran aimed at regime change is an illegal war of choice, it is not supported by the American people, it was not authorized by Congress as required by Article 1, Section 8 of the Constitution and the 1973 War Powers Act, and it is a grave violation of international law.

The combined U.S. and Israeli attacks on Iran are not justifiable on nonproliferation grounds. There was no imminent nuclear threat from Iran that justifies this reckless, brazen attack that has metastasized into a major regional conflict.

Trump and his aides have in recent days and hours claimed, without credible evidence, that Iran had restarted its nuclear program, had enough available nuclear material to build a bomb within days and was developing long-range missiles that could “soon” be capable of hitting the United States. All three of these claims are false.

This is the second time in less than a year that the United States and Israel, both nuclear-armed states, have launched attacks on Iran in the midst of ongoing U.S.-Iranian negotiations regarding Tehran’s nuclear program.

As the Omani Foreign Minister and mediator of the talks reported just hours before Trump’s attacks on Feb. 28, the U.S.-Iranian negotiations were very serious and making significant progress toward an effective, verifiable, lasting deal that could have blocked Iran’s capabilities to build nuclear weapons.

The United States could have and should have negotiated in good faith with Iran to arrive at effective solutions that address concerns about Iran’s nuclear program and stockpiles of enriched uranium, including by securing the return of International Atomic Energy Agency inspectors who were ejected from Iran following the June 2025 U.S.-Israeli attacks. The return of the inspectors will be further delayed in the midst of a potentially drawn-out conflict. Without effective monitoring, the whereabouts and security of Iran’s nuclear material will now become even more uncertain.

Although Iran’s current leadership is repressive and the Iranian people deserve to choose their own government, war is not the answer. The U.S. Congress and responsible states around the world have a solemn moral and legal duty to oppose this rogue aggression, beginning with emergency legislation and international mediation to stop further hostilities by all sides.

Campaign for Peace Disarmament and Common Security