Classical Age of the Ottoman Empire
Expansion continued during the first half of the reign of Suleiman I (r. 1520-1566), who conquered first Belgrade (1521) and Rhodes, before invading Hungary in 1526, defeating and killing King Louis II in the Battle of Mohács and briefly occupying Buda. Lacking a king, Hungary descended into civil war over the succession, and the Ottomans gave support to John Zápolya as a vassal prince. When their rivals the Habsburgs began to achieve the upper hand, Suleiman directly intervened by again conquering Buda and annexing it to the empire in 1541. Elsewhere, Suleiman led major campaigns against Safavid Iran, conquering Baghdad in 1534 and annexing Iraq. Ottoman rule was further extended with the incorporation of much of North Africa, the conquest of coastal Yemen in 1538, and the subsequent annexation of the interior.
Fuzûlî
In 1534, the Ottoman sultan Süleymân I conquered the region of Baghdad, where Fuzûlî lived, from the Safavid Empire. Fuzûlî now had the chance to become a court poet under the Ottoman patronage system, and he composed a number of "kasîde"s, or panegyric poems, in praise of the sultan and members of his retinue, and as a result, he was granted a stipend. However, owing to the complexities of the Ottoman bureaucracy, this stipend never materialized. In one of his best-known works, the letter "Şikâyetnâme" (شکايت نامه; "Complaint"), Fuzûlî spoke out against such bureaucracy and its attendant corruption: