1099 - Jerusalem fell to the Crusaders.
1410 - Poles and Lithuanians defeated the Teutonic knights at Tannenburg, Prussia.
1789 - The electors of Paris set up a "Commune" to live without the authority of the government.
1806 - Lieutenant Zebulon Pike began his western expedition from Fort Belle Fountaine, near St. Louis, MO.
1813 - Napoleon Bonaparte's representatives met with the Allies in Prague to discuss peace terms.
1834 - Lord Napier of England arrived in Macao, China as the first chief superintendent of trade.
1870 - Georgia became the last of the Confederate states to be readmitted to the Union.
1876 - George Washington Bradley of St. Louis pitched the first no-hitter in baseball in a 2-0 win over Hartford.
1885 - In New York, the Niagara Reservation State Park opened.
1888 - "Printers’ Ink" was first sold.
1895 - Ex-prime minister of Bulgaria, Stephen Stambulov, was murdered by Macedonian rebels.
1901 - Over 74,000 Pittsburgh steel workers went on strike.
1904 - The first Buddhist temple in the U.S. was established in Los Angeles, CA.
1916 - In Seattle, WA, Pacific Aero Products was incorporated by William Boeing. The company was later renamed Boeing Co.
1918 - The Second Battle of the Marne began during World War I.
1922 - The duck-billed platypus arrived in America, direct from Australia. It was exhibited at the Bronx Zoo in New York City.
1942 - The first supply flight from India to China over the 'Hump' was carried to help China's war effort.
1958 - Five thousand U.S. Marines landed in Beirut, Lebanon, to protect the pro-Western government. The troops withdrew October 25, 1958.
1965 - The spacecraft Mariner IV sent back the first close-up pictures of the planet Mars.
1968 - ABC-TV premiered "One Life to Live".
1968 - Commercial air travel began between the U.S. and the U.S.S.R., when the first plane, a Soviet Aeroflot jet, landed at Kennedy International Airport in New York.
1971 - U.S. President Nixon announced he would visit the People's Republic of China to seek a "normalization of relations."
1972 - NASA's Pioneer 10 spacecraft became the first to enter the asteroid belt.
1973 - Nolan Ryan (California Angels) became the first pitcher in two decades to win two no-hitters in a season. (California)
1981 - Steven Ford, son of former President Gerald R. Ford, appeared in a seduction scene of "The Young and the Restless" on CBS-TV. Ford played the part of Andy.
1985 - Baseball players voted to strike on August 6th if no contract was reached with baseball owners. The strike turned out to be just a one-day interruption.
1987 - Taiwan ended thirty-seven years of martial law.
2006 - The social networking service Twitter was launched.
2009 - "Harry Potter and the Half-Blood Prince" was released in theaters in the U.S. It was the sixth movie in the series.
2011 - "Harry Potter and the Deathly Hallows: Part 2" was released in theaters in the U.S. and U.K. It was the final film in the Harry Potter series.