It was believed that Saddam Hussain was in Iraq in 2003. He was funding and training terrorist organization as well as arming the country with ***suspected*** WMD's. America later turned the country over to the Iraqi government after an attempt to implement democracy.
A strong navy, used in concert with allied nations and backed up by a vigorous economy, is a potent deterrent to conflict and enables diplomacy. It convinces adversaries that war is either unwinnable or too costly to wage