Osman Ghazi the first Sultan of Ottoman Empire

Osman I or Osman Ghazi (Ottoman Turkish: عثمان غازى, romanized: ʿOsmān Ġāzī; Turkish: I. Osman or Osman Gazi; died 1323/4), sometimes transliterated archaically as Othman, was the leader of the Ottoman Turks and the founder of the Ottoman dynasty. The dynasty bearing his name later established and ruled the Ottoman Empire (first known as the Ottoman Beylik or Emirate). This state, while only a small Turkmen principality during Osman's lifetime, transformed into a world empire in the centuries after his death. It existed until shortly after the end of World War I. Owing to the scarcity of historical sources dating from his lifetime, very little factual information about Osman has survived. Not a single written source survives from Osman's reign. The Ottomans did not record the history of Osman's life until the fifteenth century, more than a hundred years after his death. Because of this, historians find it very challenging to differentiate between fact and myth...