TBS Phase I Exam Questions and Answers 2026 | 100+ Marine Corps Leadership, Law of War, Risk Management & Tactical Communications Questions | MAGTF, Land Navigation, CASEVAC & Operational Security | The Basic School (TBS),

This comprehensive TBS Phase I Exam study guide contains more than 200 exam-style questions and 100% correct answers covering Marine Corps leadership, warfighting doctrine, tactical communications, operational security, risk management, Law of War, command and control, casualty evacuation procedures, military correspondence, land navigation, and officer professional development concepts taught at The Basic School (TBS). Designed for newly commissioned Marine officers, officer candidates, NROTC midshipmen, PLC candidates, OCC candidates, and professional military education students, this resource provides a structured and examination-focused review of the foundational knowledge required for success during TBS Phase I training and evaluations. The material strengthens both doctrinal understanding and practical leadership application while preparing students for academic assessments, field exercises, and future command responsibilities. A major focus of the guide is Marine Corps leadership development and officership. Students will review the Five Horizontal Themes of Officership, including exemplary character, commitment to leading Marines 24/7, decision-making in the fog of war, embracing the warrior ethos, and maintaining mental and physical toughness. The material explores leadership responsibilities, ethical conduct, troop welfare, combat leadership, professional standards, and the qualities expected of Marine officers in both garrison and combat environments. These concepts form the foundation of Marine Corps leadership philosophy and officer development. The document provides extensive coverage of Marine Corps warfighting doctrine based on MCDP 1: Warfighting. Students will study the timeless yet evolving nature of war, the strategic, operational, and tactical levels of war, maneuver warfare philosophy, friction, uncertainty, fluidity, complexity, the human dimension of conflict, decentralized command, surfaces and gaps, and the relationship between physical, moral, and mental forces. Additional instruction covers commander’s intent, including purpose, method, and desired end state, enabling students to understand how commanders communicate vision and intent throughout the chain of command. The study guide also delivers detailed instruction on tactical communications and command and control within the Marine Air-Ground Task Force (MAGTF). Students will examine the role of tactical communications in enabling information flow across all levels of command, the purpose of command and control in reducing uncertainty and managing time, and responsibilities associated with Communications Security (COMSEC), Cryptographic Controlled Items (CCI), and the Electronic Key Management System (EKMS). These topics reinforce the importance of secure, reliable communications in supporting maneuver warfare and mission accomplishment. Operational security, classified information management, and force protection are covered extensively throughout the material. Students will review security classification levels including Top Secret, Secret, and Confidential information; Personally Identifiable Information (PII); espionage awareness; classified material handling procedures; and responsibilities associated with safeguarding national security information. The guide explains how Marine Corps personnel protect sensitive information, prevent unauthorized disclosure, and support force protection through effective security practices. A significant portion of the guide focuses on Law of War and Law of Armed Conflict (LOAC) principles. Students will study the origins and purposes of the Law of War, proportionality, protected places, treatment of Enemy Prisoners of War (EPWs), self-defense principles, civilian protections, and the legal and ethical responsibilities of Marines during armed conflict. Key concepts include necessity, proportionality, de-escalation, safeguarding noncombatants, protection of medical personnel, humane treatment of prisoners, and reporting violations of international humanitarian law. These principles align with international law and Marine Corps operational standards. Risk management concepts are examined in detail through instruction on hazard identification, hazard assessment, risk control development, implementation, and supervision. Students will review engineering controls, administrative controls, physical controls, hazard mitigation procedures, and methods for evaluating risk control effectiveness based on suitability, feasibility, and acceptability. These topics support safe training environments, combat readiness, and informed decision-making across all operational activities. The material further covers casualty evacuation (CASEVAC) priorities, deadly force authorization, alcohol abuse policy, Marine Corps hazing policy, sexual harassment prevention, military correspondence formats, Leave and Earnings Statement (LES) familiarity, map reading, marginal information interpretation, terrain analysis, grid coordinates, azimuth conversion using the LARS method, and two-point intersection procedures. These subjects reinforce the professional, administrative, and tactical competencies expected of Marine officers throughout their careers. Additional content examines the roles of support organizations including the American Red Cross, Navy-Marine Corps Relief Society (NMCRS), and Marine Corps Family Service Centers. Students will learn how these organizations provide emergency assistance, family support services, education programs, financial counseling, and resources that contribute to Marine readiness and family well-being. Understanding these support systems is essential for effective leadership and troop welfare management. The content aligns closely with official Marine Corps doctrinal publications and professional military education references, including MCDP 1 Warfighting, MCDP 6 Command and Control, MCWP 3-40.3 Communications and Information Systems, MCRP 6-11A Leading Marines, Marine Corps Risk Management doctrine, Law of Armed Conflict guidance, Operational Security policies, and The Basic School Program of Instruction. These references establish the doctrinal foundation for leadership, warfighting, risk management, tactical communications, and officer development throughout the United States Marine Corps. Relevant Students: Marine Corps officers, TBS students, officer candidates, NROTC midshipmen, PLC candidates, OCC candidates, infantry officers, logistics officers, communications officers, intelligence officers, military academy students, professional military education participants, and service members preparing for TBS Phase I examinations, leadership evaluations, officer qualification assessments, promotion boards, and advanced military training programs. 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