What happened in Iraq in 2011

At the beginning of 2011, the proclaimed terrorist group al-Qaeda in Iraq was eventually defeated in May after Huthaifa al-Batawi was killed and who was the only man left in the group as the head leader. Also there were number of attacks on American military forces happened in Iraq during the year. On January 15, 2011,two U.S. soldiers were killed and a third injured when an Iraqi soldier opened fire on U.S. troops during training in the northern city of Mosul.