Over the next year, however, the Polish forces were subject to attrition, as the Sejm again refused to raise taxes and pay the army, resulting in mass desertions of unpaid soldiery. The Polish problems were further aggravated by the incompetent leadership of hetman Michał Kazimierz Pac, who obstructed Sobieski's leadership, while the Ottomans continued to receive reinforcements. Nonetheless in 1674 the Commonwealth resumed the offensive, taking advantage of a new Muscovy-Ottoman conflict that year, and the Polish-Ottoman war remained undecided.:275 Sobieski's force of 6,000 defeated 20,000 Turks and Tatars under Ibrahim Shyshman in the battle of Lwow in August 1675.:653  Even after the Battle of Trembowla, the Sejm still refused his pleas for more funds and a larger army.:653 In 1676, after Sobieski's 16,000 withstood the two-week siege of Żurawno, by 100,000 men under Ibrahim Pasha, a new peace treaty was signed, the Treaty of Żurawno.:655  The peace treaty partially reversing those from Buczacz: the Ottomans kept approximately two thirds of the territories they gained in 1672, and the Commonwealth no longer was obliged to pay any kind of tribute to the Empire; a large number of Polish prisoners were released by the Ottomans.
Question: Why were soldiers deserting the Sejm?
Answer: refused to raise taxes; the Sejm again refused to raise taxes and pay the army