The United States is currently fighting Iran.

As of the end of July 2026, the U.S. has not formally declared war on any country, but the most intense and direct actual military actions are its conflict with Iran.
The current core conflict: the U.S.-Iran war
On February 28, 2026, the United States, together with Israel, launched a large-scale airstrike campaign against Iran, kicking off the war (initially known as Operation Epic Fury). The targets were mainly Iran’s nuclear facilities, missile bases, air-defense systems, and command centers.
There was a brief ceasefire in between. In mid-June, both sides signed a peace agreement, but it soon fell apart. After entering July, the conflict escalated again:
• The U.S. carried out airstrikes on multiple nights against military targets inside Iran;
• Iran retaliated with missiles and drones, striking U.S. bases in places such as Jordan and Iraq;
• As of now, the U.S. has confirmed at least 17 service members killed, with hundreds injured.
The Strait of Hormuz has also been pulled into the situation, with shipping severely affected, and oil prices once saw sharp fluctuations. The Houthis have also carried out coordinated actions toward the Red Sea, threatening a blockade.
Simply put, this is no longer “proxy warfare”—it is direct military confrontation between the United States and Iran, and it is still ongoing.
Other military actions still underway
Besides Iran, the U.S. is deeply involved in several other conflicts, but the intensity is clearly much lower:
• Ukraine: Continue providing military assistance to Ukraine to counter Russia, but without directly sending troops to fight.
• Israel-related conflicts: Continued support for Israel, involving directions such as Gaza and Lebanon (Hezbollah).
• Anti-ISIS and counterterrorism: Still small-scale operations and drone strikes in places such as Iraq, Syria, and Somalia.
• Red Sea/Houthis: Escort and strike operations against the Yemeni Houthi forces are still ongoing.
For the most part, these are assistance, airstrikes, or limited strikes—far less intense than direct engagements between the U.S. and Iran.
Summary
If you only ask “who the U.S. is fighting right now,” the most accurate answer is: mainly Iran.
Other conflicts are also happening, but at the level of direct firefights, casualties, and sustained airstrikes, what is truly happening is between the U.S. and Iran.
There is still no clear end timeline for this war. Both sides are fighting on and off, and ceasefire agreements repeatedly break down. Whether it will further expand later remains unclear.