[2] The main roles in these events were played by Roman's sons, Daniel and Vasylko Romanovich, and Rostislav Mikhailovich , who laid claim to the Halych throne.

Rostislav gained the support of his father-in-law, the Hungarian king Béla IV, and local boyars dissatisfied with Romanovich rule.

Meanwhile, the Romanovich army, commanded by Daniel and Vasylko, marched towards Yaroslavl, hoping to break up the forces of Roscislav.

His cavalry, consisting of Ruthenian, Hungarian and Lesser Polish troops, advanced through a ravine towards Daniel's forces.

Rostislav hoped to quickly smash the enemy and push them towards the river, where the terrain difficulties were to make it impossible to develop defensive formations.

Seeing the threat, Daniel sent a detachment of good warriors led by Vasilek and other trusted commanders to assist Andrew.

[6] In the meantime, Daniel, taking advantage of the moment gained, managed to set up his forces in battle formation.