And his son Sigismund Augustus, Tarnowski took the royal side during the so-called Kokosza wojna, or Poultry War, of 1537 and also in 1548 when the turbulent szlachta tried to annul by force the marriage of Sigismund Augustus with Barbara Radziwill.
Then he conceived the idea of using the Cossacks, who were deeply attached to him, as a means of chastising the szlachta, and at the same time forcing a war with Turkey, which would make his military genius indispensable to the republic, and enable him if successful to carry out domestic reforms by force of arms. His chief confidant in this still mysterious affair was the veteran grand hetman of the crown, Stanislaw Koniecpolski, who understood the Cossacks better than any man then living, but differed from the king in preferring the conquest of the Crimea to an open war with Turkey.
Thus, at his last diet, held at Piotrkow, in 1547, Lupa Podlodowski, the champion of the szlachta, o p enly threatened him with rebellion.
As a man of education and refinement, fond of music, the fine arts, and polite literature, he was unintelligible to the szlachta, who regarded all artists and poets as either mechanics or adventurers.
At the very beginning of his reign he came into collision with the turbulent szlachta or gentry, who had already begun to oust the great families from power.