1st » Management of the United States Customs Service and the United States Secret Service move to the United States Department of Homeland Security.
1st » The International Criminal Court holds its inaugural session in The Hague.
5th » In Haifa, 17 Israeli civilians are killed by a Hamas suicide bomb in the Haifa bus 37 massacre.
12th » Zoran Đinđić, Prime Minister of Serbia, is Assassination of Zoran Đinđić named assassinated in Belgrade.
13th » Human evolution: The journal Nature (journal) e.g Nature reports that 350,000-year-old footprints of an upright-walking human had been found in Italy.
16th » Rachel Corrie, a 23-year-old American woman involved with the International Solidarity Movement, is killed trying to prevent a Palestinian home from being destroyed by a bulldozer in Rafah.
17th » Secretary of State for Foreign and Commonwealth Affairs Robin Cook, resigns from the Cabinet of the United Kingdom called British Cabinet in disagreement with government plans for the 2003 invasion of Iraq.
20th » 2003 invasion of Iraq: In the early hours of the morning, the United States and three other countries (the UK, Australia and Poland) begin military operations in Iraq.
23rd » Battle of Nasiriyah, first major conflict during the 2003 invasion of Iraq named invasion of Iraq.
24th » The Arab League votes 21–1 in favor of a resolution demanding the immediate and unconditional removal of U.S. and British soldiers from Iraq.