| 87541 | August 3 | Event | 1645 – Thirty Years' War: The Second Battle of Nördlingen sees French forces defeating those of the Holy Roman Empire. |
| 87542 | August 3 | Event | 1678 – Robert LaSalle builds the Le Griffon, the first known ship built on the Great Lakes. |
| 87543 | August 3 | Event | 1778 – The theatre La Scala is inaugurated. |
| 87544 | August 3 | Event | 1795 – Treaty of Greenville is signed. |
| 87545 | August 3 | Event | 1811 – First ascent of Jungfrau, third highest summit in the Bernese Alps by brothers Johann Rudolf and Hieronymus Meyer. |
| 87546 | August 3 | Event | 1852 – Harvard University wins the first Boat Race between Yale University and Harvard. The race is also the first American intercollegiate athletic event |
| 87547 | August 3 | Event | 1860 – The Second Maori War begins in New Zealand. |
| 87548 | August 3 | Event | 1900 – The Firestone Tire and Rubber Company is founded. |
| 87549 | August 3 | Event | 1903 – Macedonian rebels in Kruševo proclaim the Kruševo Republic, which exists only for ten days before Ottoman Turks lay waste to the town. |
| 87550 | August 3 | Event | 1907 – Judge Kenesaw Mountain Landis fines Standard Oil of Indiana a record $29.4 million for illegal rebating to freight carriers the conviction and fine are later reversed on appeal. |
| 87551 | August 3 | Event | 1913 – A major labour dispute, known as the Wheatland hop riot, starts in Wheatland, California. |
| 87552 | August 3 | Event | 1914 – World War I: Germany declares war against France. |
| 87553 | August 3 | Event | 1921 – Major League Baseball Commissioner Kenesaw Mountain Landis confirms the ban of the eight Chicago Black Sox, the day after they were acquitted by a Chicago court. |
| 87554 | August 3 | Event | 1929 – Jiddu Krishnamurti, tagged as the messianic "World Teacher", shocks the Theosophy movement by dissolving the Order of the Star, the organisation built to support him. |
| 87555 | August 3 | Event | 1936 – Jesse Owens wins the 100 meter dash, defeating Ralph Metcalfe, at the Berlin Olympics. |
| 87556 | August 3 | Event | 1936 – A fire wipes out Kursha-2 in the Meshchera Lowlands, Ryazan Oblast, Russia, killing 1,200 and leaving only 20 survivors. |
| 87557 | August 3 | Event | 1940 – World War II: Italian forces begin the invasion of British Somaliland. |
| 87558 | August 3 | Event | 1946 – Santa Claus Land, the world's first themed amusement park, opens in Santa Claus, Indiana, United States. |
| 87559 | August 3 | Event | 1948 – Whittaker Chambers accuses Alger Hiss of being a communist and a spy for the Soviet Union. |
| 87560 | August 3 | Event | 1958 – The nuclear submarine USS Nautilus travels beneath the Arctic ice cap. |
| 87561 | August 3 | Event | 1959 – Portugal's state police force PIDE fires upon striking workers in Bissau, Portuguese Guinea, killing over 50 people. |
| 87562 | August 3 | Event | 1960 – Niger gains independence from France. |
| 87563 | August 3 | Event | 1961 – The New Democratic Party of Canada is founded by the merger of the Co-operative Commonwealth Federation and the Canadian Labour Congress. |
| 87564 | August 3 | Event | 1972 – The United States Senate ratifies the Anti-Ballistic Missile Treaty. |
| 87565 | August 3 | Event | 1975 – A privately chartered Boeing 707 strikes a mountain peak and crashes near Agadir, Morocco, killing 188. |
| 87566 | August 3 | Event | 1977 – The United States Senate begins its hearing on Project MKUltra. |
| 87567 | August 3 | Event | 1977 – Tandy Corporation announces the TRS-80, one of the world's first mass-produced personal computers. |
| 87568 | August 3 | Event | 1981 – Senegalese opposition parties, under the leadership of Mamadou Dia, launch the Antiimperialist Action Front – Suxxali Reew Mi. |
| 87569 | August 3 | Event | 1997 – Oued El-Had and Mezouara massacre in Algeria a total of 116 villagers killed, 40 in Oued El-Had and 76 in Mezouara. |
| 87570 | August 3 | Event | 2001 – The Real IRA detonates a car bomb in Ealing, London, England, United Kingdom injuring seven people. |