sentences:  By the sixteenth century, the power of the Ottoman Empire had increased gradually, as did the territory controlled by them in the Balkans, while the Kingdom of Hungary was weakened by the peasants' uprisings.Under the reign of Louis II Jagiellon (1516–1526), internal dissentions divided the nobility.Instigating war by feigned diplomatic insult, Suleiman the Magnificent (1520–1566) attacked the Kingdom of Hungary and captured Belgrade in 1521.