The Polish forces were led by Grand Field HetmanStanisław Żółkiewski who had been sent against Swedish forces gathering by Tallinn by Grand Crown HetmanJan Zamoyski. Żółkiewski attacked "on the march" with two squadrons of Polish hussars. The charge however was not successful. As a result, the Swedish forces put up frisian horses as a protection against further frontal cavalry charges. Żółkiewski then sent light cavalry on a round about flanking maneuver which attacked the Swedes from behind, coinciding with another charge by the hussars. The Swedish lines broke as a result. The Swedes were led by Reinhold Anrep.
References
Leszek Podhorodecki, "Stanisław Żółkiewski", Warszawa 1988, ISBN83-205-4082-8