,
Southern Bessarabia and
Brăila as Ottoman raya In the Hungarian battles between
Ferdinand Habsburg and
John Zápolya, he initially sided with Ferdinand, but when the Ottomans awarded recognition to Zápolya, he switched allegiances. In exchange for the citadel of
Bistrița, he entered
Transylvania on Zápolya's side and crushed Ferdinand at
Feldioara on 22 June 1529. Zápolya then gave him Ungurașul but in spite of the efforts made Rareș was unable to occupy Bistrița. Neither could he subdue
Brașov, which he besieged again in October for several weeks. Thus he was far from realizing his plan of ruling Transylvania. He had to content himself with
Ciceu and
Cetatea de Baltă, ruled by his father, and with the bishopric of Vad. He then shifted his attention to
Poland and in 1530 occupied
Pokuttya. The Polish general
Jan Tarnowski soon reconquered it, but when Petru re-entered Pokuttya, he was defeated by Tarnowski through superior tactics at
Obertyn on 22 August 1531. Events forced him to return to Transylvania. Here, the Ottomans had dispatched an Italian adventurer,
Lodovico Gritti, to restore order. Transylvanian voievod
István Majláth and the country's nobles forced him to close himself in
Mediaș. Since Petru had received orders from the sultan to free Gritti, he sent his trusted vassal Huru to do the job. However, instead of helping Gritti, Huru lured him out and delivered him to his enemies, who killed him on the spot (1534). Rareș then killed Gritti's sons, who had entered Moldavia. The Ottomans could not presently retaliate, being occupied in Persia, so Petru was free to continue his intrigues between Ferdinand and Zápolya. The Poles tried in vain to have him replaced in 1538, appealing to the sultan to punish him. Then the over-zealous Petru, deserted by his own boyars, his capital
Iași ablaze, and faced with a Turkish-Tatar-Polish army headed by
Suleiman the Magnificent, who was bringing
Ștefan Lăcustă to the throne, had to flee to his Transylvanian fortress of Ciceu. It is said that, during this flight, Rareș wandered for two weeks in the impassable forests of Transylvania, with difficulty making his way through spiny vegetation and ancient bushes and trees. Overcome by hunger, thirst, shock and despair, he was seen by a group of fishermen. Since he himself had been a fisherman, he was recognized and they sheltered and cared for him. Once he had recovered, his hosts garbed him in fishermen's clothes and showed him a shortcut to his citadel. ==Second period of rule==