1386 - Battle of Sempach
In the Battle of Sempach, fought on 9th July 1386 2km (1.25 miles) outside the town of Sempach (battlefield pictured), Habsburg forces opposing the expansion of Lucerne interests are routed by troops of the Old Swiss Confederacy.
The defeat decimates the ranks of Swabian nobility who fell in the Habsburg cause. For the Swiss, the victory establishes the confederacy as a significant political and military force and heralds the growth of the eight cantons of the Old Swiss Confederacy into thirteen.
Little more than a century later, after the Bergundian Wars of the 1470s and the Swabian War of 1499, Switzerland will win de facto independence from the Holy Roman Empire, eventually being formally recognised as an independent nation at the conclusion of the Thirty Years' War in 1648.