Question: How,long was the Ottoman reign over the Balkans?
About the article "Balkan Wars", section "Abstract".

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The Uzunköprü Bridge meaning "Long Bridge" () gave its name to the town.
The bridge was built between 1426 and 1443 by head architect Muslihiddin on the orders of Ottoman Sultan Murad II.
The ancient stone-built bridge, which has 174 arches, is long and up to wide.
Some of the arches are pointed and some are round.
Uzunköprü is the longest stone bridge in Turkey.
The bridge was made to cross the Ergene River, which was a natural barrier for advances into the Balkans for the Ottoman Empire; its old name was Ergene Bridge ().
It is so long in order to cross a low-lying marshy area.
The bridge was restored in 1963.
The Edirne – Izmir state road still passes over Uzunköprü. 
This effectively meant that Austria was assuring Russia that to stay out of a war between Russia and the Ottoman Empire.
It also meant that the Austrians and the Russians were agreeing on how the Balkans would be split up in the case of a Russian victory. 
Murat's successor was Mehmet III.
During the last years of Murat's reign and whole of Mehmet's reign, the Ottoman empire was engaged in a war so called Long War (1591–1606) in which the Ottoman extension was checked by the Habsburg Empire.
The Ottoman standing on the Eastern frontier was not better, particularly in Transcaucasia.
Yerevan fell to Savafids in 1604, followed by other defeats. 
In the century after the death of Osman I in 1326, Ottoman rule began to extend over the eastern Mediterranean and the Balkans.
The important city of Thessaloniki was captured from the Venetians in 1387, and the Turkish victory at the Battle of Kosovo in 1389 effectively marked the end of Serbian power in the region, paving the way for Ottoman expansion into the rest of Europe. 
The Ottoman beylik's first capital was located in Bursa in 1326.
Edirne which was conquered in 1361 was the next capital city.
After largely expanding to Europe and Anatolia, in 1453, the Ottomans nearly completed the conquest of the Byzantine Empire by capturing its capital, Constantinople during the reign of Mehmed II.
This city has become the capital city of the Empire following Edirne.
The Ottoman Empire would continue to expand into the Eastern Anatolia, Central Europe, the Caucasus, North and East Africa, the islands in the Mediterranean, Greater Syria, Mesopotamia, and the Arabian peninsula in the 15th, 16th and 17th centuries.
The Ottoman Empire's power and prestige peaked in the 16th and 17th centuries, particularly during the reign of Suleiman the Magnificent.
The empire was often at odds with the Holy Roman Empire in its steady advance towards Central Europe through the Balkans and the southern part of the Polish-Lithuanian Commonwealth.
In addition, the Ottomans were often at war with Persia over territorial disputes.
At sea, the empire contended with the Holy Leagues, composed of Habsburg Spain, the Republic of Venice and the Knights of St. John, for control of the Mediterranean.
In the Indian Ocean, the Ottoman navy frequently confronted Portuguese fleets in order to defend its traditional monopoly over the maritime trade routes between East Asia and Western Europe; these routes faced new competition with the Portuguese discovery of the Cape of Good Hope in 1488.
The Treaty of Karlowitz in 1699 marked the beginning of the Ottoman decline; some territories were lost by the treaty: Austria received all of Hungary and Transylvania except the Banat; Venice obtained most of Dalmatia along with the Morea (the Peloponnesus peninsula in southern Greece); Poland recovered Podolia.
Throughout the 19th and early 20th centuries, the Ottoman Empire continued losing its territories, including Greece, Algeria, Tunisia, Libya and the Balkans in the 1912–1913 Balkan Wars.
Anatolia remained multi-ethnic until the early 20th century (see Rise of Nationalism under the Ottoman Empire).
Its inhabitants were of varied ethnicities, including Turks, Armenians, Kurds, Greeks, Frenchs, and Italians (particularly from Genoa and Venice).
Faced with territorial losses on all sides the Ottoman Empire forged an alliance with Germany who supported it with troops and equipment.
The Ottoman Empire joined the World War I on the side of the Central Powers, after granting two German warships as refugees.
When the First World War coupled with ethnic tensions devastated Anatolia, it brought about the collapse of the Ottoman EmpireOn October 30, 1918, the Armistice of Mudros was signed, followed by the imposition of Treaty of Sèvres on August 10, 1920 by Allied Powers, which was never ratified.
The Treaty of Sèvres would break up the Ottoman Empire and force large concessions on territories of the Empire in favour of Greece, Italy, Britain and France.