Iran plans to escalate attacks against U.S. troops in Syria

Covert plan to kill Americans is seen as part of a larger Russian-backed strategy to oust the United States from Syria.

Iran is arming militants in Syria for a new phase of lethal attacks against U.S. troops in the country, while also working with Russia on a broader strategy to drive Americans from the region, intelligence officials and leaked classified documents say.

Iran and its allies are building and training forces to use more powerful armor-piercing roadside bombs intended specifically to target U.S. military vehicles and kill U.S. personnel, according to classified intelligence reports obtained by The Washington Post. Such attacks would constitute an escalation of Iran’s long-running campaign of using proxy militias to launch rocket and drone strikes on U.S. forces in Syria.

Drone attacks have wounded six U.S. service members and killed a Defense Department contractor, and the new explosive devices could add to the toll of U.S. casualties, risking a wider military confrontation with Iran, current and former intelligence analysts and weapons experts say. The same type of weapon, called an explosively formed penetrator, or EFP, was used by pro-Iranian insurgents in lethal attacks against American military convoys during the U.S. occupation of Iraq.

Officials with Iran’s elite Quds Force unit directed and oversaw testing of one of the explosives, which reportedly sliced through a tank’s armored plating in a trial run conducted in late January in Dumayr, east of Damascus, the Syrian capital, according to one of the intelligence reports. The document, part of the trove of classified materials leaked on the messaging platform Discord, appears to be based on intercepted communications by Syrian and Lebanese militants allied to Iran. One apparent attempt to use such devices against U.S. forces was apparently thwarted in late February when three bombs were seized by U.S.-allied Kurdish fighters in northeastern Syria, a second document states.

“There has been a sea change in their risk-acceptance in killing Americans in Syria,” said Michael Knights, an expert on Iranian-backed militia groups and a founder of the website Militia Spotlight. Noting the devastating toll exacted by EFP bombs during the Iraq War, he added: “This will definitely kill people. And they’re thinking very hard about how to do it.”

Another document in the trove describes a new and broader effort by Moscow, Damascus and Tehran to oust the United States from Syria, a long-sought goal that could allow Syrian President Bashar al-Assad to reclaim eastern provinces now controlled by U.S.-backed Kurdish forces. The past three U.S. administrations have maintained a small contingent of U.S. troops in Syria — about 900 at any given time, augmented by hundreds more contractors — to prevent a resurgence by Islamic State militants in the country, thwart Iranian and Russian ambitions, and provide leverage for other strategic objectives.

U.S. administrations have justified the deployment under the 2001 and 2002 Authorizations for Use of Military Force, which Congress passed in the wake of the Sept. 11, 2001, terrorist attacks to fight al-Qaeda. But the presence of U.S. troops in Syria also creates opportunities for new conflict: Another document in the trove describes how Iran and allied militias were preparing to retaliate for Israeli strikes on their forces by hitting U.S. bases in Syria.

The leaked documents describe plans for a wide-ranging campaign by U.S. opponents that would involve stoking popular resistance and supporting a grass-roots movement to carry out attacks against Americans in eastern and northeastern Syria. High-ranking Russian, Iranian and Syrian military and intelligence officials met in November 2022 and agreed on establishing a “coordination center” for directing the campaign, according to a classified intelligence assessment prepared in January.

There were no indications in the documents of direct Russian involvement in planning the bombing campaign. But the leaked documents point to a more active role by Moscow in the broader anti-U.S. effort. Russia, like Iran, intervened militarily in Syria’s civil war to keep the Assad regime in power and now backs the government’s efforts to regain control of the entire country. In the months since the leaked documents were written, Russia has engaged in new provocations against U.S. forces, including violating deconfliction agreements, flying over U.S. bases and buzzing U.S. aircraft.