The term "козак" (Cossack) refers to a member of a group of predominantly East Slavic people known for their military prowess and distinct cultural identity. Historically, Cossacks emerged in the 15th century in the regions of modern-day Ukraine and Russia. They were known for their horsemanship, self-governance, and role as frontier warriors, often serving as a buffer between the Russian Empire and neighboring territories. Cossacks played a significant role in the history of Ukraine and Russia, participating in various uprisings and conflicts. They formed semi-autonomous communities, known as Cossack hosts, which were characterized by democratic traditions and a strong sense of camaraderie. Today, Cossack heritage is celebrated through cultural festivals, music, and traditional dress.