Orhan Gazi was the second ruler of the Ottoman Empire, taking the throne after his father, Osman I. He reigned from 1281 to 1362 and played a crucial role in expanding the empire's territory. Under his leadership, the Ottomans captured important cities like Bursa, which became their first major capital. Orhan Gazi is also known for establishing a more organized government and military structure. He introduced the timar system, which granted land to soldiers in exchange for military service. This helped strengthen the empire and laid the foundation for its future growth and success.