Dominate the 2026 TBS Phase 1 Exam:
Complete Study Guide with Expert
Strategies & In-Depth Explanations
Description:
Unlock your potential with the most comprehensive TBS Phase 1 Exam study guide for 2026.
This expertly crafted resource simplifies complex topics like tactical combat casualty care, Law
of Armed Conflict (LOAC), operational security (OPSEC), and military leadership into clear,
actionable insights. Each question includes detailed explanations to ensure you grasp
the why behind the answers—not just the what. Aligned with current Marine Corps doctrine, this
guide prepares you to excel on the exam and lead with confidence in the field.
Download now to secure your success and step into leadership fully prepared!
, 2026 TBS Phase 1 Exam Guide: Tactics, LOAC, OPSEC &
Leadership Strategies
1. What is the definition of OPSEC?
Answer: b) The process to deny adversaries critical information about friendly capabilities and
intentions
Explanation: OPSEC is a systematic process used to identify, control, and protect critical
information and subsequently analyze friendly actions associated with military operations to
deny useful information to adversaries.
2. Which of the following is NOT an official classification level?
Answer: d) FOUO
Explanation: FOUO (For Official Use Only) is a dissemination control marking used for
unclassified, sensitive information. It is not a classification level like Confidential, Secret, or Top
Secret.
3. Who is directly responsible for the security of classified materials within a company?
Answer: c) The Commanding Officer (CO) of the company
Explanation: The Commanding Officer holds ultimate responsibility for all matters within the
command, including the security and accountability of classified material.
4. Which vector is known for carrying Lyme Disease, characterized by a "bulls-eye" rash?
Answer: c) Tick
Explanation: Lyme Disease is a bacterial infection transmitted through the bite of an infected
black-legged tick. A common early sign is a circular red rash that often resembles a bull's-eye.
5. A Marine is experiencing rapid breathing, dizziness, and pale, clammy skin after
exertion in a hot environment. What is the most likely condition?
Answer: b) Heat Exhaustion
Explanation: Heat exhaustion is caused by the body's inability to cool itself properly. Symptoms
include heavy sweating, faintness, dizziness, fatigue, and cool, moist skin. It is a serious
condition that can lead to heat stroke if untreated.
Complete Study Guide with Expert
Strategies & In-Depth Explanations
Description:
Unlock your potential with the most comprehensive TBS Phase 1 Exam study guide for 2026.
This expertly crafted resource simplifies complex topics like tactical combat casualty care, Law
of Armed Conflict (LOAC), operational security (OPSEC), and military leadership into clear,
actionable insights. Each question includes detailed explanations to ensure you grasp
the why behind the answers—not just the what. Aligned with current Marine Corps doctrine, this
guide prepares you to excel on the exam and lead with confidence in the field.
Download now to secure your success and step into leadership fully prepared!
, 2026 TBS Phase 1 Exam Guide: Tactics, LOAC, OPSEC &
Leadership Strategies
1. What is the definition of OPSEC?
Answer: b) The process to deny adversaries critical information about friendly capabilities and
intentions
Explanation: OPSEC is a systematic process used to identify, control, and protect critical
information and subsequently analyze friendly actions associated with military operations to
deny useful information to adversaries.
2. Which of the following is NOT an official classification level?
Answer: d) FOUO
Explanation: FOUO (For Official Use Only) is a dissemination control marking used for
unclassified, sensitive information. It is not a classification level like Confidential, Secret, or Top
Secret.
3. Who is directly responsible for the security of classified materials within a company?
Answer: c) The Commanding Officer (CO) of the company
Explanation: The Commanding Officer holds ultimate responsibility for all matters within the
command, including the security and accountability of classified material.
4. Which vector is known for carrying Lyme Disease, characterized by a "bulls-eye" rash?
Answer: c) Tick
Explanation: Lyme Disease is a bacterial infection transmitted through the bite of an infected
black-legged tick. A common early sign is a circular red rash that often resembles a bull's-eye.
5. A Marine is experiencing rapid breathing, dizziness, and pale, clammy skin after
exertion in a hot environment. What is the most likely condition?
Answer: b) Heat Exhaustion
Explanation: Heat exhaustion is caused by the body's inability to cool itself properly. Symptoms
include heavy sweating, faintness, dizziness, fatigue, and cool, moist skin. It is a serious
condition that can lead to heat stroke if untreated.
