September 15, 1916: The British introduce the tank as a weapon against the Germans at the Battle of Flers-Courcelette during the Somme offensive, hoping to break the deadlock of the trenches. The Mark I tank could negotiate barbed wire and was impervious to rifle and machine gun fire, but vulnerable to artillery. It was mechanically unrelaible though; at its debut only 32 of the 49 tanks deployed reached the start line. At Flers, a British tank battalion advanced 3.2 km and drove up the main street of the village, prompting a press report which announced: "A tank is walking up the High Street of Flers with the British Army cheering behind."    
September 16, 1908: General Motors is founded by former carriage-maker William Crapo "Billy" Durant. Durant incorporated with a capital of $2,000. Within 12 days the company had generated stocks worth $12,000,000.
September 19, 1783: Ötzi the Iceman, a Copper Age, or Chalcolithic, European man and the most ancient of human remains ever found, is discovered in the Schnalstal glacier in the Ötztal Alps, near Hauslabjoch, on the border between Austria and Italy. The body and his belongings are displayed in the South Tyrol Museum of Archaeology in Bolzano, northern Italy.