During the First Crusade, Christian knights from Europe capture Jerusalem after seven weeks of siege and begin massacring the city’s Muslim and Jewish population. Beginning in the 11th century, Christians in Jerusalem were increasingly persecuted by the city’s Islamic rulers, especially when control of the holy city passed from the relatively tolerant Egyptians to the […]

Zebulon Pike, the U.S. Army officer who in 1805 led an exploring party in search of the source of the Mississippi River, sets off with a new expedition to explore the American Southwest. Pike was instructed to seek out headwaters of the Arkansas and Red rivers and to investigate Spanish settlements in New Mexico. Pike […]

On July 15, 1918, near the Marne River in the Champagne region of France, the Germans begin what would be their final offensive push of World War I. Dubbed the Second Battle of the Marne, the conflict ended several days later in a major victory for the Allies. The German general Erich Ludendorff, convinced that […]

John Christie, one of England’s most notorious killers, is executed. Four months earlier, on March 25, the police and a tenant at 10 Rillington Place in West London made an awful discovery: the bodies of four women in an empty apartment, three in a hidden cupboard and one more beneath the floorboards. Christie, who used […]

The unmanned spacecraft Mariner 4 passes over Mars at an altitude of 6,000 feet and sends back to Earth the first close-up images of the red planet. Launched in November 1964, Mariner 4 carried a television camera and six other science instruments to study Mars and interplanetary space within the solar system. Reaching Mars on […]

During a live television and radio broadcast, President Richard Nixon stuns the nation by announcing that he will visit communist China the following year. The statement marked a dramatic turning point in U.S.-China relations, as well as a major shift in American foreign policy. Nixon was not always so eager to reach out to China. […]

On July 15, 1978, the “Longest Walk”—a 2,800-mile trek for Native American justice that had started with several hundred marchers in California in California—ends in Washington, D.C., accompanied by thousands of supporters. The intent of the event was to call attention to issues affecting Native Americans, such as a lack of jobs and housing, and […]

Johnny Cash’s 50-year country music career reaches a low point on July 15, 1986, when Columbia Records drops him from its roster after more than a quarter-century of history-making partnership, producing more than 60 albums. Columbia first signed Johnny Cash in 1958, using a lucrative contract to lure him away from Sun Records, his first […]

The San Francisco-based podcasting company Odeo officially releases Twttr—later changed to Twitter—to the public. Over the next few years, Twitter exploded in popularity, becoming one of the world’s leading social networking platforms.