Ertugrul Bey was the father of Osman Ghazi and the leader of the Kayi tribe, which was a part of the larger Oghuz Turkic tribal confederation. He was born in the 13th century in what is now modern-day Turkey and is known for his role in the establishment of the Ottoman Empire. Ertugrul Bey was a skilled warrior and leader who fought against the Byzantine Empire and other neighboring states. He is also known for his close relationship with the Sufi mystic Sheikh Edebali, who played a significant role in shaping Ertugrul Bey's worldview and guiding him in his leadership. Ertugrul Bey died in 1281, but his legacy lived on through his son Osman Ghazi and the Ottoman Empire that he helped to establish.

Ertugrul Ghazi was a skilled warrior and leader who fought in many battles throughout his life. He is known for his role in defending the Kayi tribe and expanding its territory. Some of the battles that Ertugrul Ghazi fought in include the Battle of Sogut, the Battle of Kösedağ, and the Battle of Inegöl. He also fought against the Byzantine Empire and other neighboring states. Ertugrul Ghazi's military prowess and leadership skills were instrumental in the establishment of the Ottoman Empire, which lasted for centuries and had a significant impact on world history.

The exact cause of Ertugrul Ghazi's death is not known, as there are different accounts of how he died. According to some sources, he died in 1281 at the age of 90, while others suggest that he died in 1288. It is believed that he was buried in Sogut, which was the capital of the Ottoman Empire during his lifetime. Ertugrul Ghazi's legacy lived on through his son Osman Ghazi, who went on to establish the Ottoman Empire and expand its territory. Ertugrul Ghazi is remembered as a brave warrior and leader who played a significant role in the history of the Turkish people and the establishment of the Ottoman Empire.   

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