In 1594 Zamoyski once again failed to stop a Tatar incursion in the southern borders. The next year was much more successful, as in Moldavia in 1595 he was victorious in the Battle of Cecora, and helped hospodar Ieremia Movilă (Jeremi Mohyła) gain the throne. In 1600 he fought against Michael the Brave (Michał Waleczny, Mihai Viteazul), hospodar of Wallachia and the new Prince of Transylvania, who had conquered Moldavia a few months earlier. He defeated him on the Bukova (Bucovu) and restored Ieremia to the throne. He also helped his brother, Simion Movilă to become brief ruler of Wallachia, thus spreading the influence of the Commonwealth to the Central Danube.