Around late August or early September, Wiśniowiecki met with the army regimentarzs Władysław Dominik Zasławski-Ostrogski, Mikołaj Ostroróg and Aleksander Koniecpolski. He was not on overly friendly terms with them, as he resented being passed in military nominations, but after short negotiations, he agreed to follow their orders, and thus reduced to a junior commander status which had little impact over the next phase of the campaign. On 23 September, their forces were, however, defeated at the Battle of Pyliavtsi; near the end of the battle some accounts suggest Wiśniowiecki was offered the hetman's position, but refused. On 28 September in Lviv, Wiśniowiecki, with popular support, was given a field regimentarz nomination; about a week later this nomination was confirmed by the Sejm. To the anger of Lviv's townfolk, he decided to focus on retreating towards the key fortress in Zamość instead of Lviv; he would leave garrisons on both towns, and keep his army in the field. In the end, the cities were not captured by the Cossacks, who in the light of the coming winter decided to retreat, after being paid a ransom by both town councils; no other large field battle took place that year.