It formed at the end of the 13th century, from a nucleus in what is now Central Switzerland, expanding to include the cities of Zürich and Bern by the middle of the 14th century. This formed a rare union of rural and urban communes, all of which enjoyed imperial immediacy in the Holy Roman Empire.


This confederation of eight cantons (Acht Orte) was politically and militarily successful for more than a century, culminating in the Burgundy Wars of the 1470s which established it as a power in the complicated political landscape dominated by France and the Habsburgs. Its success resulted in the addition of more confederates, increasing the number of cantons to thirteen (Dreizehn Orte) by 1513. The confederacy pledged neutrality in 1647 (under the threat of the Thirty Years' War), although many Swiss served privately as mercenaries in the Italian Wars and during the early modern period.


After the Swabian War of 1499 the confederacy was a de facto independent state throughout the early modern period, although still nominally part of the Holy Roman Empire until 1648 when the Treaty of Westphalia ended the Thirty Years' War. The Swiss Reformation divided the confederates into Reformed and Catholic parties, resulting in internal conflict from the 16th to the 18th centuries; as a result, the federal diet (Tagsatzung) was often paralysed by hostility between the factions. The Swiss Confederacy fell to invasion by the French Revolutionary Army in 1798, after which it became the short-lived Helvetic Republic.