 Complete the following phrase:  In the century after the death of Osman I, Ottoman rule began to extend over Anatolia and the Balkans. The earliest conflicts began during the ByzantineOttoman wars, waged in Anatolia in the late 13th century before entering Europe in the mid-14th century, followed by the BulgarianOttoman wars and the SerbianOttoman wars waged beginning in the mid 14th century. Much of this period was characterised by Ottoman expansion into the Balkans. Osmans son, Orhan, captured the northwestern Anatolian city of Bursa in 1326, making it the new capital of the Ottoman state and supplanting Byzantine control in the region. The important port city of Thessaloniki was captured from the Venetians in 1387 and sacked. The Ottoman victory in Kosovo in 1389 effectively marked 