2026 Israeli-United States Strikes on Iran: A Timeline of Escalation

A coordinated military operation launched by the United States and Israel against Iran on February 28, 2026, has triggered a significant escalation of conflict in the Middle East. The strikes, aimed at Iran’s leadership and military infrastructure, have been met with retaliatory missile and drone attacks, resulting in casualties and widespread regional repercussions. This article provides a detailed timeline of events as they unfolded.

Initial Strikes and Retaliation (February 28, 2026)

The conflict began around 0620 GMT on February 28, with reports of explosions in Tehran, Iran. Israel’s Defense Minister Israel Katz confirmed a “preemptive” strike, declaring a nationwide state of emergency and activating air raid sirens across Israel. Reports from Iranian media indicated missile strikes in central Tehran, Isfahan, Qom, and Kermanshah, including a strike near the office of Supreme Leader Ali Khamenei. The operation was quickly identified as a joint U.S.-Israeli effort.

Both Israel and Iran subsequently closed their airspace. U.S. Assessments concluded that negotiations with Iran were no longer viable, with Washington stating the strikes aimed to dismantle Iran’s security apparatus. U.S. President Donald Trump announced a large-scale military campaign to destroy Iran’s missile industry, naval forces, and nuclear capabilities. He stated the initial phase of the operation would last four days and target senior leadership, including Khamenei.

Iran responded swiftly, with media reports indicating preparations for “crushing” retaliation. Missile launches from Iran were detected, with explosions reported in northern Israel, prompting civilians to seek shelter. The Islamic Revolution Guard Corps (IRGC) announced large-scale missile and drone attacks. Further explosions were reported across Israel, causing damage in Haifa. Simultaneously, Iranian media reported strikes on U.S. Military bases across the region, including Bahrain, the United Arab Emirates, Qatar, Saudi Arabia, Kuwait, and Jordan.

By the end of the day, Iranian media reported a deadly strike on a girls’ elementary school in southern Iran, with the death toll reaching 165, according to IRNA. The IRGC claimed to have destroyed a U.S. Radar installation in Qatar and targeted at least 14 U.S. Bases in the region. The UN Security Council convened an emergency session to address the escalating conflict. The Iranian Red Crescent reported 201 deaths and 747 injuries across 24 provinces.

Escalation and Leadership Changes (March 1, 2026)

The escalation continued on March 1, with reports indicating the death of four relatives of Supreme Leader Khamenei. Later that day, Iranian media confirmed Khamenei’s death, leading to the declaration of 40 days of national mourning. Trump confirmed Khamenei’s death on social media, stating military operations would continue.

U.S. Officials, as reported by CBS News, indicated that approximately 40 Iranian officials, including Defense Minister Aziz Nasirzadeh and IRGC commander Mohammad Pakpour, had been killed. Mohammad Bagher Ghalibaf, the Iranian Parliament Speaker, announced the preparation of contingency plans for the post-Khamenei period. Ali Larijani, secretary of Iran’s Supreme National Security Council, stated that an interim leadership council would be formed and a new supreme leader selected.

The IRGC claimed to have launched four ballistic missiles at the U.S. Aircraft carrier USS Abraham Lincoln, signaling a “new phase” in their retaliatory strikes. The Pentagon confirmed the deaths of three U.S. Troops in the operations against Iran, marking the first American casualties of the conflict. The IRGC further claimed to have struck three oil tankers belonging to the United States and Britain in the Gulf and the Strait of Hormuz, reporting the vessels were on fire. The Israeli military asserted it had achieved “air superiority in the skies over Tehran” following a wave of airstrikes targeting the Iranian capital.

Current Status

As of March 2, 2026, the conflict remains ongoing. The situation is highly volatile, with continued missile exchanges and the potential for further escalation. The closure of the Strait of Hormuz by the IRGC adds to the regional instability.