Original: September 12 & ndash ; Battle of Vienna : The Ottoman siege of the city is broken with the arrival of a force of 70,000 Polish , Austrians and Germans under Polish-Lithuanian king Jan III Sobieski , whose cavalry turns their flank ( considered to be the turning point in the Ottoman Empire 's fortunes ) .
Simplified: The siege is broken at the Battle of Vienna on September 12 with the arrival of a force of 70,000 Polish , Austrians and Germans under Polish-Lithuanian king Jan III Sobieski , whose cavalry turns their flank .