The U.S. embassy in Baghdad came under siege on 31 December 2019 following U.S. retaliation for an attack by the pro-Iranian Kataeb Hezbollah in which four service members were wounded and one civilian contractor was killed. In response, Marines and aircraft were immediately dispatched from Kuwait for defense of the embassy and overwatch. On 2 January 2020, the U.S. launched an airstrike on a convoy, killing Iranian Quds Force Major-General Qasem Soleimani and Iraqi militia leader Abu Mahdi al-Muhandis.[36] An additional 4,000 U.S. troops were mobilized to the region, including some 750 from the 82nd Airborne Division.[37] In an annual report released by the Pentagon on May 6, 2020, it cited that approximately 132 civilians have been killed in 2019 as part of US military operations in Iraq, Afghanistan, Somalia and Syria.