The last US declared war was WWII.
WW2 was the last declared war fought by the US.
As of 2012 there is no war between Iraq and the United States, declared or undeclared.
They declared war on the fledgling Jewish State.
The US last declared war in December 1941.
The last US declared war was December 11, 1945.
Kuwiat was invaded by Iraq in the 1990s for oil purposes. The USA got involved and declared war on Iraq. this war was commonly knoown as Operation Desert Storm, the Gulf War, or the Persian Gulf War.
Operation Iraqi Freedom (2003 to present) is a military operation (campaign). The last declared war fought by the US was WW2.
2001 There was Desert Storm - 1990 and 2001. THEY WERE NOT declared wars. They were actions authorized by the UN.
The Iraq War aka the Occupation of Iraq, though it is not "officially" a declared war by the United States and is instead a military campaign. He also started/caused the Afghanistan war
A preventative war is a war that is declared with the goal of preventing a much larger war outbreak in the near future. An example would be the Iraq War (if we assume that Iraq did have Weapons of Mass Destruction). Under the concept of preventative war, the Invasion of Iraq would have the goal of preventing a chemical or nuclear war started by Iraq in the near future.
The U.S never declared war on Iraq. Congress gave Former President George W. Bush the power to do what ever is necessary to stop "terrorism". That being said, when the United States occupied Iraq, Saddam Hussein was the president since July 6th 1979.