The Treaty of Basel of 22 September1499 was an armistice following the Battle of Dornach, concluding the Swabian War, fought between the Swabian League and the Old Swiss Confederacy. The accession of Basel to the confederacy in 1501 is a direct consequence of the treaty. September 22 is the 265th day of the year in the Gregorian calendar (266th in leap years). ... 1499 was a common year starting on Sunday (see link for calendar) of the Gregorian calendar. ... At the Battle of Dornach (47:29°NⲠ7 37°EⲠ) , on 22 July 1499, Emperor Maximilian I was decisively beaten by Old Swiss Confederacy. ... The Battle of Hard was the first major battle of the Swabian War. ... The Swabian League, an association of German cities, principally in the territory which had formed the old duchy of Swabia. ... 1550 illustration for the Sempacherbrief of 1393, one of the major alliance contracts of the Old Swiss Confederacy The Old Swiss Confederacy was the precursor of modern-day Switzerland. ... Basel (British English traditionally: Basle and more recently Basel , German: Basel , French: Bâle , Italian: Basilea ) is Switzerlands third most populous city (166,563 inhabitants (2004); 690,000 inhabitants in the conurbation stretching across the immediate cantonal and national boundaries made Basel Switzerlands second-largest urban area as... 1501 was a common year starting on Tuesday (see link for calendar) of the Gregorian calendar. ...