How a single afternoon of combat permanently dismantled the Ottoman grip on Hungary
In 1687, the Second Battle of Mohács turned the tide of the Great Turkish War. What began as a cautious maneuver by the Holy Roman Empire ended in a total Ottoman collapse, triggering a political crisis in Constantinople and cementing Habsburg control over the Hungarian kingdom for generations to come.
The conflict, also identified as the Battle of Harsány Mountain, occurred on 12 August 1687. It served as a dramatic reversal of the earlier First Battle of Mohács, effectively ending Ottoman dominance in the region. Following the failed Ottoman siege of Vienna in 1683, Imperial forces under Charles of Lorraine and Maximilian II Emanuel had steadily regained territory. By 1687, the Habsburgs rejected Ottoman peace overtures, aiming to reclaim all of Hungary.
The battle was defined by a tactical miscalculation. The Ottoman Grand Vizier, Sari Süleyman Paşa, attempted to ambush the Imperial army as it marched toward Siklós. However, the Ottoman offensive against the Imperial left wing was met with unexpected resilience. After a fierce defense, the Habsburg commanders—including the Margrave of Baden-Baden and Prince Eugene of Savoy—launched a decisive counterattack at 3:00 pm. The Ottoman defensive lines shattered, leading to a chaotic retreat.
The aftermath was catastrophic for the Ottoman Empire. They lost approximately 10,000 men, most of their artillery, and vast quantities of equipment. The defeat sparked a mutiny among the Ottoman ranks, leading to the execution of the Grand Vizier and the eventual deposition of Sultan Mehmed IV in November 1687. With the Ottoman military structure in ruins, Imperial forces rapidly seized key settlements across Slavonia and Transylvania. By December, the Diet of Pressburg established a hereditary Habsburg monarchy over Hungary, fundamentally altering the map of Central Europe.
Source: Battle of Mohács (1687)
