Osman I, also called Osman Ghazi, was the founder of the Ottoman Empire, namely the first of the sultans. He was born in 1258 in the town of Söğüt, located in modern-day northwestern Bilecik province, which was close to the Byzantine border back then. The fact that he was born the same year when the Mongols destroyed the Abbasid Empire was an interesting coincidence that gave hope for the future. He was the youngest of Ertuğrul Ghazi's three sons.
He participated in battles with his father starting from a young age. During his father's reign, he went to battles as an army commander seven or eight times. This was why he was given the title of "ghazi," which means veteran soldier in Turkish, and he was well known among the soldiers from a young age. Ertuğrul Ghazi sent him to the sultan of the Seljuk Sultanate of Rum in Konya as a representative several times, where he would meet the statesmen and the elders of the Mevlevi order.
He had a dream one night when he was a guest in the lodge of the Muslim scholar Sheikh Edebali in Bilecik in 1277. Osman always loved and respected Sheikh Edebali and attended his religious talks. In his dream, a moon arose from the breast of the sheikh and entered into Osman's own chest. Then branches of a plane tree began coming out of Osman's navel and its shade compassed the whole world. Rivers were flowing and people were walking around in its shadow. The sheikh interpreted this dream when Osman told him about it the next day: “God blessed you and your descendants with a long reign. You shall marry my daughter. Your children shall be world conquerors.”
Thus, Osman Ghazi married the sheikh's daughter. Sheikh Edebali, who is said to be descended from Prophet Muhammad, was the first mufti of the Ottoman Empire.
Upon the death of Ertuğrul Ghazi in 1281, Osman Ghazi was brought to power by military chiefs and guild leaders despite his young age. Thus, he became the head of the small beylik (principality) between Söğüt and Domaniç thanks to his good morals, strength, bravery and superior knowledge. The Seljuk sultan confirmed his principality by sending him a firman (edict). He continued his father's mission and got on well with his neighbors, the Byzantine lords and governors known as tekfurs.
One day, Osman Ghazi heard about an ambush being set up by the tekfurs of Inegöl and Karacahisar from a spy. He accepted to battle in Ermenibeli, near today's Inegöl in northwestern Turkey, in 1284 but Osman withdrew when his nephew was killed. All his troops were infantry, and this was the first military operation of the Ottoman Empire. The next year, he conquered Kulacahisar, a district near Ermenibeli, to avenge the ambush and to begin expanding toward the north. This is the first conquest in Ottoman history.
He defeated the conspiracy of the Karacahisar and Inegöl tekfurs through a victory in the Battle of Ekizce in 1288. His brother was martyred in this battle, which brought Eskişehir under the beylik. Upon this victory, the Seljuk sultan sent a tuğ (a pole with horse or yak tail hair arranged in a circular form that served as a Seljuk flag), a tabl (a traditional form of drum) and a firman (imperial edict) as symbols of autonomy. After that, Osman Ghazi ordered a military band to play for an hour every day in the afternoon, and he stood up for the duration of the concert, out of respect for the sultan. This tradition of standing during the concert continued until the time of Sultan Mehmed II, also known as Mehmed the Conqueror.
He appointed a qadi (judge) to Karacahisar (today a suburb of Eskişehir), which he conquered in 1289. In Friday sermons, the name of Osman Ghazi had begun to be mentioned alongside the Abbasid Caliph and the Seljuk Sultan. A silver coin was minted in the name of Osman Ghazi. Since these were signs of sovereignty, a de facto state was being established. However, Osman Ghazi continued his respect and devotion to the Seljuk sultan, albeit in appearance. The Ottoman principality had the status of an autonomous province.
He foiled the conspiracy of the tekfurs of Bilecik and Yarhisar with a trick. The tekfur of Bilecik was marrying the daughter of Yarhisar's tekfur. They also invited Osman Ghazi to the wedding. Their aim was to take him by surprise and kill him. The tekfur of Harmankaya informed his friend Osman Ghazi of the conspiracy.
Osman Ghazi sent a large number of lambs to the Bilecik tekfur as a wedding gift. Saying that they would go to the summer pasture after the wedding, he requested that their belongings and women be taken to the castle and that the wedding be held in an open place. The tekfur accepted these requests. Instead of goods, Osman Ghazi loaded the horses with weapons and sent them to Bilecik along with 40 soldiers dressed as women. The soldiers who entered the castle easily captured it since only the guards remained. Osman Ghazi was victorious in the clash with the tekfurs that took place in the wedding venue in Çakırpınar.
The bride, who was among the captives, converted to Islam by taking the name Nilüfer and married Osman Ghazi's son Orhan Bey. Thus, Bilecik, Yarhisar, Inegöl and Yenişehir were gradually conquered. Osman Ghazi made Yenişehir the capital of the state. He redeveloped the conquered towns. He distributed the lands not as properties but as timars (fiefs), that is, to family members and commanders to collect their taxes and feed soldiers in return. This was the first land law of the Ottomans.
Meanwhile, the Mongols were invading Anatolia. On Jan. 27, 1300, when Seljuk Sultan Alaeddin Keykubad III was imprisoned by Ilkhanate/Mongol ruler Gazan Khan, the commanders pledged allegiance to Osman Ghazi in accordance with an old Turkish tradition. Autonomous Seljuk principalities declared their independence one after another. In fact, their allegiance to the Seljuk sultan had now turned to the Mongols.
During the reign of Sultan Abdulhamid II centuries later, this event was accepted as the founding date of the Ottoman Empire. After that, many commanders and beys (princes) gathered around Osman Shah. His small principality was important because of its strategic location close to the border.
The Byzantine Emperor Andronikos II, who could not prevent Osman Ghazi's activities through the tekfurs, this time sent an army to march on Osman’s beylik. Osman Ghazi defeated this army in the Battle of Koyunhisar (Bapheus) near Yalova in 1301. Iznik (Nicaea) was besieged. Osman Ghazi had his uncle Dündar Bey executed in 1302 since he had refused to accept Osman’s principality for a long time and worked against him by collaborating with the tekfurs.
In 1306, the tekfur of Bursa and his allied tekfurs were defeated in Dinboz. The Ottomans signed its first military treaty with the tekfur of Uluabat that year. The tekfur of Uluabat surrendered other tekfurs to Osman on the condition that he would not attack the fortress and would not cross the bridge in front of the town. Acting on the principle of “pacta sunt servanda,” no Ottoman sultan has ever crossed this bridge and they used boats to cross the Çapraz Stream whenever necessary.
Osman Ghazi took Mudanya in 1307 and reached the Marmara Sea. A naval base was established on the island of Imrali. In fact, according to some Western sources, Osman Ghazi even launched an expedition to the Aegean island of Rhodes. Due to the harshness of the tekfurs’ rule and the high taxes, the villagers living in the lands to the east of the Marmara Sea accepted Osman Ghazi’s rule with gratitude. Many of them adopted Islam and were Turkified in the process. In fact, Köse Mihal, the tekfur of Harmankaya, converted to Islam and participated in many military operations alongside Osman. His lineage has continued up to this time.
From 1317 onward, Osman mainly sent his son Orhan Bey and commanders referred to as "alp" to most military operations. The main goal of Osman Ghazi was the conquest of Bursa, which was a splendid city at that time. However, attacking the fortress would have resulted in the loss of many men, and this was contrary to Osman Ghazi's character. For this reason, he chose to have the castle besieged and to win the hearts of the people.
Osman Ghazi, who was tired due to his active life, fell ill. He died in 1324 or 1326 from a gout attack. He was 66 or 68 years old. He ruled for 43 years. After the conquest of Bursa, his body was buried on a hill in this city. One of his sons, Savcı Bey, was martyred in a battle. His younger son Orhan Bey ascended to his father’s position. Osman's third son Alaaddin Ali Pasha became Orhan's vizier. His other four sons served under Orhan's reign as military commanders. Another son of Osman Ghazi was also sent to the Seljuk palace to be raised by Ertuğrul Ghazi.
Osman was described as having dark skin and a round face, a man of medium height with broad shoulders, and his torso relatively long to his feet. He wore plain clothes. He wore a Khorasani turban on his head, on which a wide and long cloth was wrapped in a twisted shape on a red broadcloth cap. His flag was white. He spoke plainly and simply. It was during his time that Turkish ceased to be regarded as a vulgar language spoken by the common people and became a literary and exquisite language.
In the chronicles, Osman is described as a generous and just person. He had food cooked in his kitchen every three days and distributed it to the poor, widows and orphans. He had no fondness for property. “He sought nothing but the consent of God and the prayers of the people,” the chronicles say. When he died, Osman left behind a few Arabian horses, swords, armor, a couple of oxen and a few sheep, leaving no property or money.
Osman Ghazi was both brave and devoted. He was modest. He wouldn't take any action without getting the opinion of those around him. He respected scholars and Sufis. He was just. By appointing a judge to each town, he eliminated the intervention of local administrators in justice. He established a system that would save the Muslim people from the misery they fell into. He was a simple Muslim, devoted to his religion, far from pretense.
In the conquest of Karacahisar, someone from Kütahya appeared before him and demanded that he be given the authority to collect the market dues (octroi). Osman Ghazi, apparently over his plain and pure logic, was surprised. “Do the traders owe you money that you want to get money from?” Osman Ghazi asked. When he learned that this was a tax paid to the government in return for the security of the town, it was not against the Sharia, and it had been the custom of the Seljuk sultans for a long time, he gave permission. This is the first law made in the Ottoman Empire. After that, the sultans made it a habit to make laws that were not contrary to Sharia in matters that were not regulated by Sharia.
Osman Ghazi is not an ordinary medieval hero but one of the greatest figures in history. His state, the smallest of the Anatolian beyliks (less than half of Switzerland) became the largest state in the world in a century and a half. Undoubtedly, this was due to Osman Ghazi being a remarkable strategy genius, as well as to the efforts of his successors. In order to survive and rule in this sensitive geography, he acted as carefully as if he were playing chess. His military life is not about fighting the tekfurs and taking random castles.
Osman divided the lands of the gradually disintegrating Byzantine Empire like a wedge. His whole goal was to reach the sea. Thus, he held the southern shores of Iznik and Uluabat lakes and positioned his beylik between the Porsuk and Sakarya rivers. Finally, his beylik reached the Marmara Sea on the shores of Mudanya and the Black Sea at the mouth of the Sakarya River. There is no doubt that this genius ruler and his distinguished successors were bestowed with the windfall at the time.
Osman Ghazi’s beylik of 4,800 square kilometers (1,853 square miles), which he inherited from his father, had grown to 16,000 square kilometers by the time he passed away. It included the cities and towns of Bilecik, Domaniç, Eskişehir, Geyve, Taraklı, Akyazı, Hendek, Mudanya, Yenişehir and Inegöl in today's Turkey. He appointed a governor to each of them from his family or one of his commanders. He tried to get on well with the enemy and kept his promises unless he got attacked.
The bequest Osman made to his son, which is almost like the constitution of the Ottoman Empire, is narrated in a verse in the history books. Its meaning is as follows: “In the end, everyone will die. I beseech you, forget about anything other than serving the religion. Our aim is to work in the way of Allah and to spread his religion. Otherwise, ours is not a case of useless fighting and conquest. Uphold justice in the country. Respect the scholars so that the affairs of the Shariah are in order. Do not be proud of the abundance of soldiers and possessions. Do not even aspire to a work that is against religion/law. Be kind to everyone. See your country's affairs in full. Work day and night to protect your people and for their welfare. This is how you gain the grace of God!”
Herbert Adams Gibbons (d.1934), American author known for his theory about the establishment of the Ottoman Empire, favors Osman Bey above the rulers who rely on the support of an entire community, such as Attila, Genghis or Timur. “Osman's work is more permanent and more influential than theirs. While others wreaked havoc in the sounds of pipes and trumpets; he has operated calmly and built a state.” Alphonse de Lamartine (d.1869), French writer who traveled throughout the Ottoman country, characterizes him as simply logical, yet ingenious, impartial and truthful, saying: “He went step by step in his conquests, stopping after each victory. He progressed slowly; but never withdrew. This is the secret of all great statesmen.”
Osman Ghazi's cautious progress, his encouragement of those around him and his subjects to a sacred goal, and his kindness to the scholars and Sufis were inherited by his successors. The society he left became a center of attraction both materially and spiritually. The honor of the idealist and enterprising men of Anatolia and even of the Islamic world gathered around this goal, which made his beylik one of the most powerful states in the world in 50 years, belongs to Osman Ghazi.