The Siege of Vienna in 1683 was arguably one of the most important events in Islamic history because of the potential stakes and the aftermath of the result. The Habsburg-Ottoman rivalry had already lasted for almost two centuries leading up to 1683. This rivalry was marked by long periods of coexistence (brought about by treaties) with violent outbursts of conflict. At the expiry of one such treaty, those in charge in Constantinople decided to pursue aggression towards their long-standing rivals. There are differences as to what the motivations behind this Ottoman aggression were; some historians claiming the Sultan only ordered the capturing of border fortresses in Upper Hungary; whilst others argue the decision to besiege Vienna was taken by the Sultan’s chief Vizier, Kara Mustafa, an ambitious man belonging to the Koprulu family who had monopolised the position of Viziership for half a century. Expansionism served a key aim for Kara Mustafa – to play a distracting role to the internal issues faced by the Ottomans, notably the increasingly damaging role played by the Janissaries.
The Ottoman army, along with the help of its Calvinist Hungarian allies, besieged Vienna with a force of around 150,000 soldiers. The Hapsburg Emperor, Leopold I, was immediately forced to flee the city. By the beginning of September the Ottoman miners had dug underground tunnels to Vienna’s inner walls and actually made significant headway; at the same time, the siege had dragged on for six weeks and living conditions had taken its toll on the city.
In the backdrop of such dire straits for Vienna, Jan Sobieski showed up at the head of the Holy League army (which had been brought together by Pope Innocent XI). Roughly 70,000 Holy League troops descended upon the Ottoman forces on September 12. The ensuing battle would last for 15 hours and resulted in the decisive defeat of the Ottomans. Apparently, it took the Holy League a week to collect all the booty left behind by the Ottomans.
The fact that the Ottomans targeted the capital of it’s rival, not once but twice (a disastrous attempt had previously been made by Suleiman the Magnificent in 1529), whilst the Hapsburgs couldn’t dream of conquering Constantinople, shows how unequal the rivalry was. But that changed after 1683. When the Holy League forces, led by Jan Sobieski defeated the Ottoman forces just outside of Vienna and lifted the siege, the Ottoman Empire began a stubborn decline which saw their power erode whilst their European adversaries gained strength. In fact this battle is often seen as the turning point in the rivalry between Christian Europe and the Islamic world. Beyond 1683, Muslim states launched no direct assaults on Europe; from that point on, Europe was in the ascendance.
If you’re interested in military history, check out this video we did on Saladin’s victory at the Battle of Hattin in 1187!