The Battle of Jaroslawice was the only major, division-size cavalry battle during World War I. It was fought on August 21, 1914 between the Austria-Hungary under and the Russian 10th Cavalry Division under general Fyodor Arturovich Keller.Peter Jung, pages 10–11, The Austro-Hungarian Forces in World War I (1) , Vladimir Littauer, p. 6, Russian Hussar, The battle took place between the villages of Jaroslawice (now Yaroslavychi, Ternopil Oblast) and Wolchkowce (now Vovchkivtsi, Ternopil Oblast) near Zborów (now Zboriv, Ukraine).
Involving thousands of cavalry on the both sides, it was arguably the last massive cavalry engagement in European history.Oberst Egon baron von Valdchtetten. Die letze Reiterschlacht der Weltgeschichte (Jaroslavice 1914)
Despite the considerable advantage in manpower and initial position, von Zaremba suffered large losses, was removed from command and court-martialed (acquitted)., Der Erste Weltkrieg und das Ende der Habsburgermonarchie 1914 - 1918, Wien 2013, 184 - 187
References
Further reading von Lauder, B., "The Cavalry Action at Jaroslawice, 21st August 1914", The Cavalry Journal, Vol. 17, pp. 453-463 A contemporary detailed description from the Austrian perspective (in English) , , Die letzte Reiterschlacht der Weltgeschichte: (Jaroslawice 1914), 1929 A contemporary detailed description from the Austrian perspective (in German) , Конный бой 10-й кавалерийской дивизии генерала графа Келлера 8/21 августа 1914 года у д. Ярославиц, Serbia, 1921 (online transcription of the book in modern Russian) A contemporary detailed description from the Russian perspective , Bitwa konna pod Jarosławicami: 21 sierpnia 1914 roku, Warszawa: Wojskowe Biuro Historyczne, 1930 A contemporary detailed description from the Polish perspective