After the biggest series of demonstrations, on February 15, 2003, New York Times writer Patrick Tyler claimed that they showed that there were two superpowers on the planet: the United States and worldwide public opinion.

[12] On October 2, the day President Bush signed into law Congress' joint resolution authorizing the war,[13] a small-scale protest was held in Chicago, attended by a crowd of roughly 1,000[14] who listened to speeches by Jesse Jackson and then-Illinois State Senator Barack Obama.

[22][23][24][25] On January 16, 2003, protests were held worldwide in opposition to a war with Iraq, including in Turkey, Egypt, Pakistan, Japan, Belgium, the Netherlands, Argentina, and the United States, where Americans attended a rally in Washington, D.C.

On January 18, anti-war demonstrations, focusing particularly but not exclusively on the expected war with Iraq, took place in villages, towns, and cities around the world, including Tokyo, Moscow, Paris, London, Dublin, Montreal, Ottawa, Toronto, Cologne, Bonn, Gothenburg, Florence, Oslo, Rotterdam, Istanbul and Cairo.

[30] Such prominent figures of demonstrations against Vietnam War in the 1960s and 70s as Pete Seeger, Tom Hayden, Joan Baez, Norman Siegel, William Sloane Coffin took part in the protests against the invasion in Iraq in the USA.

[33] On March 15, Spanish and Italian cities showed some of the largest turnouts against their governments' pro-war stance, with more than 400,000 protesters in Milan, more than 300,000 in Barcelona forming a mile-long human chain,[34] and more than 120,000 in Madrid.

[39] Thousands more marched in cities worldwide including Bangkok, Seoul, Hong Kong, Amman, Chicago, Calcutta, Melbourne, Christchurch, Dunedin, Paris, London, Portsmouth, Leeds, York, Exeter, Newcastle upon Tyne, Frankfurt, Nuremberg, Zurich, Copenhagen, Stockholm, Nicosia, Monaco, Santiago, Havana, São Paulo, Buenos Aires, Moscow, Seattle, Chicago, San Francisco, Los Angeles, Atlanta, Vancouver, Halifax, Ottawa, and Toronto, as well as cities in Yemen, Turkey, Israel, and the Palestinian territories.

[49] The students then marched around the city centre and ended up back at Albert Square at about 4pm where they remained demonstrating in front of the Town Hall for some hours.

Demonstrations were organized for a second day in a row in various US cities including Seattle, Portland, Oregon, Chicago, Atlanta, Georgia, San Francisco, and Los Angeles.

[54][55] A philosophy student of the University of Guayaquil was arrested two days later in connection to the attack, in alleged possession of radical left-wing propaganda material.

The weekly demonstrations, supported by churches, trade unions and other civic organizations, began again in January 2003 in protest to the impending invasion of Iraq.

In Derry, up to a dozen anti-war protesters stormed the Raytheon defense technologies company building staging a sit-in until removed by police.

Also about 23,000 took part in marches in Berlin, ending in a rally in Tiergarten park, protests took place in Stuttgart and Frankfurt, where 25 people were arrested as they tried to block the entrance to a US air base.

[62] In Oakland, California, police fired rubber bullets and beanbags at protesters and dockworkers outside the port, injuring at least a dozen demonstrators and six longshoremen standing nearby.

Protestors were protesting the Iraq War related action performed by American President Lines and defense contractor Stevedoring Services of America.

[66] Tens of thousands of people demonstrated in Washington, D.C., San Francisco, Reno, Nevada, and other cities around the world, in opposition to the occupation of Iraq.

The Washington and San Francisco protests were jointly organized by ANSWER (Act Now to Stop War and End Racism) and United for Peace and Justice.

[68] More than 100,000 people demonstrated in Rome and other Italian cities during Bush's visit to Pope John Paul II, who had expressed his opposition to the war in numerous occasions.

Following the speeches, participants marched from Arlington National Cemetery to the Ellipse in Washington, D.C., carrying cardboard coffins to symbolize the war dead.

[76][77] Approximately 10,000 people attending the Million Worker March in Washington, D.C., conducted a pro-labor demonstration, with a very heavy additional focus against the war in Iraq as well.

An evening rally on Parliament Hill drew another 15,000 and featured a speech by Brandon Hughey, an American soldier seeking refuge in Canada after refusing to fight in Iraq.

Major protests occurred in Baghdad, Basra, London, New York City, Washington, D.C., Portland, Oregon, Madrid, Rome, Sydney, Tokyo, Seoul, Istanbul, Toronto and Dublin.

In Washington, D.C., 200 people marched to The Pentagon to deliver a faux coffin and bag of ashes to United States Secretary of Defense Donald Rumsfeld.

Malachi Ritscher committed suicide by self-immolation on the side of the Kennedy Expressway near downtown Chicago during the morning rush hour of Friday, November 3, 2006, apparently as a protest against the Iraq war and more generally "for the mayhem and turmoil caused by my country".

[92] Numerous groups organized demonstrations in response to a January 10 speech by George W. Bush, announcing an increase of U.S. troop levels in Iraq by 21,500.

A small number of protests occurred in the wake of the Wednesday night speech, including one in Boston which resulted in 6 arrests for blocking traffic.

Thousands of anti-war protesters marched through Washington, D.C., on the fifth anniversary of the U.S.-led 2003 invasion of Iraq, some splattering red paint on government offices and scuffling with police.

Others hurled balloons full of paint at a military recruiting station and smeared it on buildings housing defense contractors Bechtel and Lockheed Martin.

In addition to the big NGOs, this was supported by local grassroots organisations such as LA Workers' Voice and Long Beach Area Peace Network.

During the 2004 Republican National Convention, Protest Warriors staged multiple counter-protests, though their confrontational approach sometimes led to friction with liberal demonstrators and even law enforcement.