During the autumn of 1394, Bayezid started gathering forces for a campaign against the Wallachian voievode Mircea I (1386–1418). In this campaign, Stefan personally led the Serbian heavy cavalry, while Serbian nobles Marko (1371–1395), Constantine Dragaš and Konstantin Balšić led their forces. Bayezid's forces crossed the Danube and the battle of Rovine took place on 17 May 1395, near present-day Pitești, with a Wallachian victory. In the battle Marko and Dragaš were killed, and Bayezid annexed their lands. According to Constantine the Philosopher in his "Life of Stefan Lazarević" before the battle Marko said to Dragaš: "I pray God to help the Christians and that I will be among the first dead in this war."