TLS7 is the seventh edition of The Leader's SMARTbook, completely updated for 2023. TLS7 focuses on gaining the human advantage and leadership as a dynamic of combat power (FM 3-0, 2022), developing leaders, and training, the most important thing the Army does to prepare for operations. Topics and chapters include Army leadership and the profession (ADP 7-0); developing leaders (FM 6-22); counseling, coaching, and mentoring (ATP 6-22.1); Army team building (ATP 6-22.6); training to fight and win (ADP 7-0 / FM 7-0 / FM 7-22); planning & preparation: training guidance, meetings, schedules, briefs; executing training events and exercises, holistic health & fitness (H2F); training evaluations, assessments, and after action reviews. Combat power is the total means of destructive and disruptive force that a military unit/formation can apply against an enemy at a given time. It is the ability to fight. Leadership is the most essential dynamic of combat power. Leadership is the activity of influencing people by providing purpose, direction, and motivation to accomplish the mission and improve the organization. The human dimension encompasses people and the interaction between individuals and groups, how they understand information and events, make decisions, generate will, and act within an operational environment. A human advantage occurs when a force holds the initiative in terms of training, morale, perception, and will. Today's Army demands trained and ready units with agile, proficient leaders. Army leaders are the competitive advantage the Army possesses that neither technology nor advanced weaponry and platforms can replace. Developing leaders is a complex and complicated undertaking because it is primarily a human endeavor—requiring constant involvement, assessment, and refinement.