The anti-war position gained renewed support and attention in the buildup to the 2003 invasion of Iraq by the U.S. and its allies. Millions of people staged mass protests across the world in the immediate prelude to the invasion, and demonstrations and other forms of anti-war activism have continued throughout the occupation. The primary opposition within the U.S. to the continued occupation of Iraq has come from the grassroots. Opposition to the conflict, how it had been fought, and complications during the aftermath period divided public sentiment in the U.S., resulting in majority public opinion turning against the war for the first time in the spring of 2004, a turn which has held since.