The relief army was now ready for a final push. At around 6:00 pm, the Polish king ordered the cavalry to attack in four contingents, three Polish groups and one from the Holy Roman Empire. 18,000 horsemen charged down the hills, the largest cavalry charge in history.[46][47] Sobieski led the charge[20]: 661 at the head of 3,000 Polish heavy lancers, the “Winged Hussars”. […] The charge quickly broke the battle lines of the Ottomans, who were already exhausted and demoralized and would begin to retreat from the battlefield.
From a song, based in history