U.S. Marines conduct an operation to clear a village of Taliban fighters on July 5, 2009, in Mian Poshteh, Afghanistan. The U.S. and NATO forces plan to withdraw their remaining troops from Afghanistan by September. Joe Raedle/Getty Images hide caption
Marine Gen. Frank McKenzie (center) visits Kabul, Afghanistan, in January 2020. The Biden administration said it plans to complete a drawdown of U.S. troops in the country by Sept. 11. Lolita Baldor/AP hide caption
A U.S. soldier stands at a spot struck by Iranian missiles in January at Ain al-Asad air base in Iraq's Anbar province. The attack was in retaliation for the U.S. drone strike that killed Iranian Gen. Qassem Soleimani. The U.S. is drawing down 2,500 troops in Iraq and Afghanistan. Qassim Abdul-Zahra/AP hide caption
U.S. soldiers walk alongside tanks from the U.S. 2nd Brigade Combat Team, 3rd Infantry Division, parked at Germany's Bremerhaven port on Feb. 21. The U.S. could be considering drawing down a portion of its armed forces based in Germany. David Hecker/Getty Images hide caption
Defense Secretary Mark Esper (left) speaks as Chairman of the Joint Chiefs of Staff Army Gen. Mark Milley listens during a briefing at the Pentagon on Monday. Susan Walsh/AP hide caption
In this Nov. 7, 2018, photo released by the U.S. Army, U.S. soldiers gather for a brief during a combined joint patrol rehearsal in Manbij, Syria. Spc. Zoe Garbarino/U.S. Army via AP hide caption
An explosion damaged a restaurant in Manbij, Syria, on Wednesday, as shown in a screen grab from the Kurdish Hawar News agency, or ANHA. ANHA/AP hide caption
U.S. Army soldiers walk as a NATO helicopter flies overhead at coalition force Forward Operating Base (FOB) Connelly in the Khogyani district in the eastern province of Nangarhar on August 13, 2015. Wakil Kohsar/AFP/Getty Images hide caption
A U.S. marine watches a statue of Saddam Hussein being toppled in Firdaus Square, in downtown Baghdad, on April 9, 2003. Jerome Delay/AP hide caption