The United States and Israel began strikes on Iran in February 2026, opening the largest American military engagement in the region in two decades. This page describes the enduring questions the conflict raises rather than its day-to-day developments, which change constantly.
The conflict follows years of unresolved dispute over Iran's nuclear program, its ballistic missile development, and its support for armed groups across the region. Negotiations after the collapse of the 2015 nuclear agreement did not produce a replacement.
Fighting has been punctuated by ceasefires and partial agreements that have repeatedly broken down. Disruption to shipping through the Strait of Hormuz has had global economic effects, since a large share of seaborne oil passes through it.
Stated American objectives have shifted over the course of the conflict, and have at various points included preventing Iranian nuclear weapons capability, degrading missile and naval forces, reopening the strait, and encouraging political change in Tehran. Whether these objectives are compatible with one another is itself disputed.
This is an active conflict. Facts on the ground change faster than any reference page can track, and readers should consult current news reporting for the present state of hostilities and negotiations.