“When American troops were about to invade Iraq in 2003 to dislodge Saddam Hussein from power, then-Maj. Gen. David Petraeus told a reporter: ‘Tell me how this ends.’ Eleven years and hundreds of billions of dollars later, thousands of U.S. troops are once again in Iraq fighting a different foe. But the same question still resonates.”
Source: What Comes After the Islamic State Is Defeated? | Foreign Policy