한국사, or Korean history, encompasses the historical development of the Korean Peninsula from ancient times to the present. It includes significant periods such as the Three Kingdoms, the Goryeo Dynasty, and the Joseon Dynasty, each contributing to Korea's cultural and political landscape. The study of 한국사 also involves key events like the Korean War and the division of Korea into North Korea and South Korea. Understanding 한국사 is essential for grasping the identity, traditions, and social dynamics of the Korean people today.