1914: Britain enters World War I by declaring war on Germany after Germany refuses to honor the neutrality of Belgium.
1944: In Amsterdam, Nazi officers arrest 15-year-old diarist Anne Frank and four other Jews in the annex where they have been hiding for two years. Frank will die in the Belsen concentration camp the following year.
1964: U.S. warships in the Gulf of Tonkin report an attack by North Vietnam. The unconfirmed report, along with a prior encounter, leads Congress to approve U.S. military involvement in Vietnam.
2002: One of the largest manhunt ever known in the UK is launched after two Soham schoolgirls disappear.