| December 2019 United States airstrikes in Iraq and Syria | |
|---|---|
| Part of the American-led interventionsin Iraq andSyria (Operation Inherent Resolve) | |
| Type | Airstrikes |
| Locations | Valley ofEuphrates River, Syria[1] |
| Target | |
| Date | 29 December 2019 (2019-12-29) 11:00 a.m. (EST) (UTC-05:00) |
| Executed by | |
| Outcome | SeeAftermath |
| Casualties | 19 (Iraq)6 (Syria)[2] killed 55+[2] injured |
On 29 December 2019, theUnited States conducted airstrikes againstKata'ib Hezbollah's weapons depots and command centers in Iraq and Syria, reportedly killing at least 25 militiamen and wounding 55 more. TheU.S. Department of Defense said the operation was in retaliation for repeated attacks on Iraqi military bases hostingOperation Inherent Resolve (OIR) coalition forces, particularly the 27 December 2019attack on aKirkuk airbase that left an American civilian contractor dead.[3][4] Kata'ib Hezbollah, an extremistShi'ite militia funded byIran,[5] denied any responsibility for the attacks.[6]
The unilateral U.S. airstrikes were condemned by the Iraqi government,Iraqi Armed Forces personnel, and Iran, and culminated in theU.S. embassy in Baghdad beingattacked by Iraqi militiamen and their supporters on 31 December 2019. This in turn led to aU.S. airstrike near Baghdad International Airport on 3 January 2020, killing Iranian generalQasem Soleimani and Kata'ib Hezbollah commanderAbu Mahdi al-Muhandis.
The United Statesintervened in Iraq in 2014 as a part ofOperation Inherent Resolve (OIR), the U.S.-led mission to combat theIslamic State of Iraq and the Levant (ISIL) terror organization, and have been training and operating alongside Iraqi forces as a part of the anti-ISIL coalition. ISIL was largely beaten back from Iraq in 2017 during aninternal conflict, with the help of U.S.-backed forces and Sunni and Shia militias. Iran, which alsointervened in Iraq, is known to supportShia Iraqi militias, a number of which are relatively hostile to the U.S. presence in Iraq and theSunni-led Iraqi government.[5] Tensions rose betweenIran and the U.S. in 2018 when U.S. PresidentDonald Trump unilaterally pulled out of the2015 nuclear deal and reimposed sanctions.[2]
On 27 December 2019, theK-1 Air Base inKirkuk province, Iraq—one of many Iraqi military bases that hosted Operation Inherent Resolve coalition personnel—was attacked by multiple rockets, killing a U.S. civilian contractor and injuring four U.S. service members and twoIraqi security forces personnel. The U.S. blamed the Iranian-backedKata'ib Hezbollah militia for the attack while the group denied responsibility.[4]
A senior U.S. official said there had been a "campaign" of 11 attacks on Iraqi bases hosting OIR personnel in the two months before the 27 December incident, many of which the U.S. attributed to Kata'ib Hezbollah.[7]
At around 11:00 amEST on 29 December 2019, the United States attacked fiveKata'ib Hezbollah positions inIraqi andSyrian territory. According to thePentagon, the U.S. targeted three locations in Iraq and two in Syria, including weapon storage facilities andcommand and control posts. One U.S. official claimed the strikes were carried out byF-15E fighter jets using precision-guided bombs and that secondary explosions were observed after some of the strikes, indicating the sites may have contained stored munitions. The ammunition facilities reportedly held both rockets and drones used by the militia.[8][9][3][4]
The U.S. did not specify the locations of the strikes, but one of the Iraqi strikes had reportedly targeted a headquarters of the militia in or nearal-Qa'im District along the western border with Syria. The strikes in Syria took place along the MiddleEuphrates River Valley (MERV) in the southeast of the country.[4][9]
Reportedly, at least 25 militia fighters were killed and 55 wounded.[2] According to Iraqi security and militia sources, at least four local Kata'ib Hezbollah commanders were among the dead in the Iraqi strikes, including Abu Ali Khazali.[10] U.S. officials could not confirm the militia casualty counts.[4]

Following the strikes on 29 December, U.S. officials warned that further actions could be undertaken to defend U.S. interests and "deter further bad behavior from militia groups or from Iran". U.S. PresidentDonald Trump was briefed before and after the strikes by his national security advisors and was informed that a further military response could be warranted.[8][4]
In a statement, U.S.Assistant to the Secretary of DefenseJonathan Hoffman called the strikes "defensive" and stated that they were in retaliation to prior Kata'ib Hezbollah attacks on both Operation Inherent Resolve coalition forces and their Iraqi partners in prior weeks and months. Hoffman also asserted that the militia had received weapons from Iran'sQuds Force that have been used to attack OIR forces.[3] U.S. Secretary of StateMike Pompeo considered the attacks a warning against any actions by Iran that endangers the lives of Americans.[11]
AnIraqi Armed Forces spokesman stated that U.S. Defense SecretaryMark Esper informed Iraqi Prime MinisterAdil Abdul-Mahdi half an hour before the operation, to which he strongly objected to and condemned; the spokesman called the unilateral U.S. airstrikes "a treacherous stab in the back".[8] Prime Minister Abdul-Mahdi later declared threedays of national mourning, from 31 December 2019 until 2 January 2020.[12][2] The prime minister argued that the strikes did not take place based on evidence of a specific threat but was insteadgeopolitically motivated by the regional tensions between Iran and the U.S.[13]
SeniorPopular Mobilization Units commanderAbu Mahdi al-Muhandis said "Our response will be very tough on the American forces in Iraq".[2]
On 31 December,PMF militiamen and their supporters attacked theU.S. Embassy in Baghdad, prompting the U.S. to deploy additional soldiers to help quell the situation.[14][15]