Iran has not issued a formal, legal declaration of war in the classic sense, but its president has recently said that Iran is in a “full-fledged” or “all‑out” war with the United States, Israel, and Europe, mainly referring to economic, political, and military confrontation rather than a new officially declared war.

What Iran’s president actually said

  • In late December 2025, President Masoud Pezeshkian said Iran is in a “full-fledged war” or “all‑out war” with America, Israel, and Europe.
  • He described this as a broad conflict involving sanctions, economic pressure, political isolation, and security threats rather than just open battlefield fighting.

Is this a formal declaration of war?

  • There has been no announcement of a classic, legal declaration of war against a specific country comparable to how states historically declare war through official parliamentary or constitutional procedures.
  • The phrase “full‑scale war” is being used politically to describe intense confrontation and ongoing clashes (like the June 2025 Israel‑Iran fighting), not a new, formally declared world war‑type conflict.

Whom did Iran say it is “at war” with?

From the president’s own words, the targets of this “war” are:

  • The United States
  • Israel
  • “Europe” (generally understood as key European powers involved in sanctions and UN measures, such as France, Germany, and the UK)

So, in simple terms: when people ask “who did Iran declare war on,” they are usually referring to these December 2025 remarks about being in an all‑out or full‑scale war with the US, Israel, and Europe, but this is political language, not a formal declaration of war under international law.

Information gathered from public forums or data available on the internet and portrayed here.