The fourth and final IPB step transforms all previous analytical work into predictive intelligence. The intelligence staff develops one or more Enemy Courses of Action (ECOAs) describing how the enemy is expected to fight under current conditions. The products directly support friendly COA development, wargaming, targeting, collection planning and decision support.
An ECOA is not a guess, but a reasoned judgment based on doctrine, terrain, weather, combat power, logistics, current disposition, historical behavior and reporting. A well-developed ECOA is feasible, logical, doctrinally consistent, evidence-based, and testable against indicators.
| Question | Example |
|---|---|
| What? | Conduct a deliberate defense |
| Why? | Delay friendly advance |
| Where? | River line BRAVO |
| When? | Within 24 hours |
| How? | Defense in depth with artillery support |
| With what? | Mechanized brigade with engineer support |
Before developing ECOAs, the enemy's objectives are established — delay friendly forces, seize key terrain, protect infrastructure, preserve combat power, fix friendly units, counterattack, enable follow-on operations — inferred from doctrine, current activity, political guidance, logistics and previous operations.
MLCOA and MDCOA
The Most Likely Course of Action is what the enemy is assessed to be most likely to execute based on available intelligence — the baseline for planning and collection. The Most Dangerous Course of Action is the enemy action that would pose the greatest risk if successfully executed: possibly less likely or contrary to recent behavior, but commanders must plan for it because of its impact.
MLCOA (confidence: high): the enemy brigade establishes a layered defense west of the river, uses artillery to disrupt the crossing, and commits the reserve only after the friendly bridgehead is identified.
MDCOA (likelihood: low · risk: very high): instead of remaining defensive, the enemy launches a pre-emptive mechanized counterattack before bridging operations begin.
| MLCOA | MDCOA |
|---|---|
| Highest probability | Highest operational risk |
| Based on current evidence | Based on maximum enemy effectiveness |
| Primary planning scenario | Contingency planning scenario |
| Supports routine ISR | Supports risk mitigation |
Normally develop more than one ECOA: most likely, most dangerous, an alternative, and a deception option where relevant. Multiple ECOAs help prevent analytical bias and support robust planning. See the card MLCOA vs MDCOA.
Developing and validating an ECOA
A complete ECOA describes nine functions: the enemy mission, the main effort (which unit has the decisive role), supporting efforts, the reserve (how and when committed), fire support, air defense, engineers, logistics, and command and control (command post locations, communications).
"The enemy brigade is expected to establish a defense in depth along the western riverbank. Reconnaissance elements will monitor friendly assembly areas while artillery targets likely crossing sites. Engineer units will reinforce existing obstacles and prepare demolitions on Bridge BRAVO. The brigade reserve will remain concealed east of the river until a friendly bridgehead is confirmed, after which it will conduct a localized counterattack."
Test every ECOA against five criteria — if it fails one, revise or discard it:
| Criterion | Question |
|---|---|
| Feasible | Does the enemy have the capability? |
| Suitable | Does it support enemy objectives? |
| Acceptable | Is the operational risk reasonable for the enemy? |
| Distinguishable | Is it clearly different from other ECOAs? |
| Complete | Are all major functions addressed? |
Analytical biases
Prediction is exactly where thinking errors strike. Watch for the five classics (see the reference card):
- Mirror imaging — assuming the enemy thinks like friendly forces;
- Confirmation bias — seeking only information that supports the existing assessment;
- Availability bias — giving excessive weight to recent events;
- Anchoring — failing to adjust when new intelligence arrives;
- Groupthink — accepting consensus without critical evaluation.
Structured analytic techniques (ACH, key assumptions check, red teaming) reduce these biases.
Enemy objectives assessment · initial ECOAs · MLCOA · MDCOA · supporting narrative · confidence assessment.