268 American troops were killed last year by roadside bombs in Afghanistan. The Pentagon says since the U.S. invasion in October 2001, 619 U.S. troops have been killed and another 5,764 have been wounded in improvised explosive device (IED) attacks. Overall, at least 1,370 U.S. troops have been killed in Afghanistan since the war began. Last year was, by far, the deadliest for all foreign troops, including Americans, with 702 killed, eclipsing the 2009 record of 504. While the number is high, it’s about a third of what the number was in Iraq.