The Ottoman wars in Europe were a series of military conflicts between the Ottoman Empire and various European states dating from the Late Middle Ages up through the early 20th century. The earliest conflicts began during the Byzantine–Ottoman wars, waged in Anatolia in the late 13th century before entering Europe in the mid 14th century with the Bulgarian–Ottoman wars. In the mid 15th century, the Serbian–Ottoman wars and the Albanian-Turkish wars were waged by Serbia and Albania respectively against the Ottoman Turks. Much of this period was characterized by Ottoman expansion into the Balkans. The Ottoman Empire made further inroads into Central Europe in the 15th and 16th centuries, culminating in the peak of Ottoman territorial claims in Europe.