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What are the purposes of defense?
- Retain key terrain or deny a vital area to the enemy
- Attrit or fix the enemy as a prelude to offensive operations
- In response to surprise action by the enemy
- Increase the enemy�s vulnerability by forcing him to concentrate his forces
What are the two types of defense?
Hasty and Deliberate
What are the five characteristics of the defense?
- Mass and Concentration
What are the defensive tasks?
- Area Defense
- Mobile Defense
What is an Area Defense?
Defensive task that concentrates on denying enemy forces access to designated terrain for a specific time rather than destroying the enemy outright
What is a Mobile Defense?
Defensive task that concentrates on the destruction or defeat of the enemy through a decisive attack by a striking force
What is a Retrograde?
Defensive task that involves organized movement away from the enemy
What are the three types of retrograde?
What are some defensive control measures?
- Battle Positions
- Direct Fire Control Measures
- Disengagement Line
- Fire Support Coordination Measures
- Forward Edge of the Battle Area
- Main Battle Area
Which defensive control measure is a defensive location oriented on a likely enemy avenue of approach?
Battle Position (BP)
Which defensive control measure is a means by which maneuver commanders employ and regulate direct fire?
Direct Fire Control Measure (DFCM). Examples: Sector of Fire, Rules of Engagement, etc.
What is a Disengagement Line (DL)
A phase line that, when crossed by the enemy, signals to defending elements that it is time to displace to their next position
Which defensie control measure assists in the rapid engagement of targets and provides safeguards for friendly forces?
Fire Support Coordination Measures (FSCM)
What is the Main Battle Area (MBA)?
Area where the bulk of a unit�s combat power is deployed to conduct decisive operations to defeat an attacking enemy
What is the goal of Fire Support Coordination Measures?
Assist in the rapid engagement of targets and provide safeguards (concerning friendly indirect fire) for friendly forces
What are the three forms of defense?
- Defense of a Linear Obstacle
- Perimeter Defense
- Reverse Slope Defense
What is an obstacle?
Any obstruction employed to disrupt, fix, turn, or block movement and to impose losses in personnel, time, and equipment
Which type of defense is best suited for the defense of a linear obstacle?
What are the perimeter defense planning considerations?
- Mutual support
- All-around defense
- Defense in depth
- Maximum use of offensive action
What are the defensive planning considerations?
- Movement and Maneuver
- Exploit the Advantages of Terrain
- Disrupt the Enemy Attack
- Mass the Effects of Combat Power
- Survivability Operations
What are mobility and counter-mobility?
- Mobility tasks include maintaining routes, coordinating gaps in existing obstacles, and supporting counterattacks
- Counter-Mobility includes obstacles block, turn, fix, disrupt, or force the enemy to attempt to breach them
What types of terrain that can be utilized as naturally occurring obstacles that provide little or no benefit to the enemy offensive?
- Unfordable streams
What are the thre survivability considerations for weapons, units, installations, and activities?
What are the indicators that an enemy may be over-extended and open to a transition to offense?
- Transition to defense
- Heavy losses
- Premature deployment
- Reduction in tempo
- Counter-attack success
- Troops/equipment capture and/or destruction indicators
What are the two transitional methods and what are the disadvantages to each?
- Forces not committed to defense: slower
- Forces committed to defense: quickly exhausted
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