This book provides a comprehensive overview of the Indonesian Army, detailing its core principles and operational structures. It begins with foundational concepts such as Pancasila (The Five Principles) and the Seven Fundamental Commitments (Samta Marga), and includes key elements like the Soldiers' Oaths (Sumpah Prajurit). The book explores significant military institutions, including the Army Command and General Staff College (SESKOAD), the Military Academy (AKMIL), Officer Candidate School (SECAPA), and the Army Women Corp (KOWAD). It examines the army’s roles in civil-military integration, international cooperation, peacekeeping, counterterrorism, and disaster relief. Additional sections cover the army's vision, mission, organizational structure, and its evolution through various strategic commands, highlighting the Indonesian Army's broad scope of duties and its critical role in national defense and stability.