The term "Sipahi" refers to a type of cavalry soldier in the Ottoman Empire, primarily serving as a mounted warrior. These soldiers were known for their loyalty and were often recruited from various regions within the empire. Sipahis played a crucial role in military campaigns and were responsible for maintaining order in the territories they controlled. In addition to their military duties, Sipahis were also landholders, receiving land grants known as timar in exchange for their service. This system allowed them to collect taxes from the land, which helped support their military obligations and contributed to the economic structure of the Ottoman Empire.