The Sinjska alka is an equestrian competition held in the Croatian town of Sinj. It commemorates a Croatian–Venetian victory in the Ottoman–Venetian war in the night of 14 August 1715, in which around 700 professional Venetian soldiers and 100 locals defended Sinj against an Ottoman army led by Mehmed-paša Ćelić of at least 40,000. Because of this victory, the Venetians retained control over Sinj and integrated it into the Venetian Dalmatia in accordance to the terms of the Treaty of Passarowitz signed in 1718.