The 2003 invasion of Iraq (March 20, 2003 - May 1, 2003) was the war fought by the United States, the United Kingdom, Australia, Poland and some other countries against Iraq, to end the rule of Saddam Hussein. The main reason that the war started was said to be because the British and American Governments believed that Iraq had dangerous weapons of mass destruction (such as chemical or nuclear weapons) that could be used against other countries. This turned out after the invasion to not be true.