The February 15, 2003 anti-war protest was a coordinated day of protests across the world, with millions of people expressing opposition to the then-imminent Iraq War. It was part of a series of protests and political events that had begun in 2002 and continued as the war took place.
Sources vary in their estimations of the number of participants involved. According to BBC News, between six and ten million people took part in protests in up to sixty countries over the weekend of the 15th and 16th; other estimates range from eight million to thirty million.
Some of the largest protests took place in Europe. The protest in Rome involved around three million people, and is listed in the 2004 Guinness Book of World Records as the largest anti-war rally in history. Madrid hosted the second largest rally with more than 1½ million people protesting the invasion of Iraq, whereas Mainland China was the only major region not to see any protests, but small demonstrations attended mainly by foreign students were seen later.