Ace Your TBS Phase 1 Exam: 2026 Study
Guide with Expert Tips on OPSEC, Tactical
Medicine, LOAC & Leadership
Description:
Get fully prepared for the TBS Phase 1 Exam with our comprehensive and up-to-date 2026
study guide. This resource breaks down complex topics like Operational Security (OPSEC),
Law of Armed Conflict (LOAC), tactical combat casualty care, and leadership principles into
clear, easy-to-understand explanations. Each section includes practice questions with detailed
answers to test your knowledge and build confidence. Designed specifically for Marine officers-
in-training, this guide aligns with the latest doctrine and real-world scenarios—ensuring you’re
ready for both the exam and the field.
Download now and lead with confidence!
, TBS Phase 1 Exam Study Guide 2026: OPSEC, LOAC, Combat
Casualty Care & More
1. What is the definition of OPSEC?
a) The process of classifying documents
b) The process to deny adversaries critical information about friendly capabilities and intentions
c) The security of communication networks
d) The physical protection of sensitive materials
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?
a) Confidential
b) Secret
c) Top Secret
d) FOUO
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?
a) The S-2 Officer
b) The Classified Material Control Custodian (CMCC)
c) The Commanding Officer (CO) of the company
d) The Executive Officer (XO)
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?
a) Mosquito
b) Chigger
c) Tick
d) Bee
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?
a) Heat Stroke
b) Heat Exhaustion
c) Heat Cramps
d) Hypothermia
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.
6. What is the correct acronym for the principles of managing cold weather injuries?
a) COLD
b) ICE
c) FROST
d) WARM
Answer: a) COLD
Guide with Expert Tips on OPSEC, Tactical
Medicine, LOAC & Leadership
Description:
Get fully prepared for the TBS Phase 1 Exam with our comprehensive and up-to-date 2026
study guide. This resource breaks down complex topics like Operational Security (OPSEC),
Law of Armed Conflict (LOAC), tactical combat casualty care, and leadership principles into
clear, easy-to-understand explanations. Each section includes practice questions with detailed
answers to test your knowledge and build confidence. Designed specifically for Marine officers-
in-training, this guide aligns with the latest doctrine and real-world scenarios—ensuring you’re
ready for both the exam and the field.
Download now and lead with confidence!
, TBS Phase 1 Exam Study Guide 2026: OPSEC, LOAC, Combat
Casualty Care & More
1. What is the definition of OPSEC?
a) The process of classifying documents
b) The process to deny adversaries critical information about friendly capabilities and intentions
c) The security of communication networks
d) The physical protection of sensitive materials
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?
a) Confidential
b) Secret
c) Top Secret
d) FOUO
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?
a) The S-2 Officer
b) The Classified Material Control Custodian (CMCC)
c) The Commanding Officer (CO) of the company
d) The Executive Officer (XO)
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?
a) Mosquito
b) Chigger
c) Tick
d) Bee
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?
a) Heat Stroke
b) Heat Exhaustion
c) Heat Cramps
d) Hypothermia
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.
6. What is the correct acronym for the principles of managing cold weather injuries?
a) COLD
b) ICE
c) FROST
d) WARM
Answer: a) COLD
