Completed the following sentence: In the 13th and 14th centuries, Macedonia was contested by the Byzantine Empire, the Despotate of Epirus, the rulers of Thessaly, and the Bulgarian Empire, but the frequent shift of borders did not result in any major population changes. ️<unk>️<unk>️<unk>️<unk>️
Battle of Maritsa in 1371 most of the Serbian lords of Macedonia recognized Ottoman suzerainty. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️