🎖️ Europa Universalis V Attrition Risk Planner

Step 1: Find Your Army Size

1. In Game: Click on your army
2. Army Panel Opens: Shows total troop count
3. Note the Number: e.g., 40,000 troops

Step 2: Find Province Supply Capacity

1. Press F9 in game (opens Supply Map Mode)
2. Map Changes: Shows numbers on each province
3. Plan Your Route: Look at provinces you'll march through
4. Find the Bottleneck: Locate the province with LOWEST supply
5. Note That Number: e.g., 25,000 supply capacity

Pro Tip: You only need to check the WORST province on your route. If that province is safe, your entire route is safe.

Step 3: Check Current Season

In Game: Look at top bar for current date/season

Seasons:

• Spring: Safe ✅
• Summer: Safe ✅
• Autumn: Slightly worse ⚠️
• Winter: DANGEROUS 🔴 (+3% attrition)

Rule of Thumb: Avoid winter marches if possible

Step 4: Enter Data in Tool

1. Army Size: Enter 40,000 (use slider or type)
2. Province Supply Capacity: Enter 25,000
3. Current Season: Select "Winter"
4. Hostile Territory: Check if marching through enemy land

Step 5: Click "Calculate Risk"

Tool analyzes and shows:

• Risk Level: Safe / Warning / Danger
• Monthly Attrition Rate: Percentage lost per month
• Monthly Losses: Exact troop count lost
• Recommendations: What to do

✅ Safe (0-2% attrition)

What it means: Minimal losses, march confidently

Example:

• 40,000 army in 60,000 supply province
• Loss: ~400 troops/month (1%)
• Action: March as one army

✓ Low Risk (2-5% attrition)

What it means: Acceptable losses for military campaigns

Example:

• 30,000 army in 28,000 supply province
• Loss: ~1,200 troops/month (4%)
• Action: Acceptable, or split if cautious

⚠️ Moderate Risk (5-8% attrition)

What it means: Significant losses, consider splitting

Example:

• 40,000 army in 25,000 supply province
• Loss: ~2,800 troops/month (7%)
• Action: Split into 2 armies recommended

🔴 High Risk (8-12% attrition)

What it means: Heavy losses, take action immediately

Example:

• 40,000 army in 20,000 supply, winter
• Loss: ~4,400 troops/month (11%)
• Action: Must split armies or wait for spring

💀 Critical (12%+ attrition)

What it means: Devastating losses, army will be crippled

Example:

• 60,000 army in 15,000 supply, winter, mountains, enemy territory
• Loss: ~9,000 troops/month (15%)
• Action: DO NOT MARCH. Rethink entire strategy.

Recommendation 1: Split Armies

Example Output:

🔀 Split into 2 armies
20,000 troops each
Reduces attrition from 12.5% to 3.2%
Saves 3,720 troops/month

How to Execute:

1. In game, select your 40,000 army
2. Click "Split Army" button
3. Set each army to 20,000 troops
4. March them separately
5. Reunite before battle

When to Use:

• Army size > province supply capacity
• High/Critical risk warning
• Always effective solution

Recommendation 2: Wait for Spring

Example Output:

🌸 Wait for Spring
Winter adds +3% attrition penalty
Reduces attrition by 24%
From 12.5% to 9.5%

How to Execute:

1. Park army in safe province
2. Wait 1-3 game months for spring
3. Then begin march

When to Use:

• Currently winter
• High attrition warning
• Not urgent military situation

Trade-off: Lose time vs save troops

Recommendation 3: Raise Maintenance

Example Output:

⚙️ Raise Army Maintenance to Maximum
Low maintenance increases attrition
Reduces attrition from 8.5% to 5.2%
Saves 1,320 troops/month

How to Execute:

1. Open Military panel (hotkey: L)
2. Find "Army Maintenance" slider
3. Set to 100% (maximum)
4. Keep at max during entire war

When to Use:

• Always before war
• During any military campaign
• Never lower during active operations

Cost: Higher monthly expenses, but saves troops

Recommendation 4: Avoid Enemy Territory

Example Output:

🗺️ Avoid Enemy Territory if Possible
Hostile territory adds +2% attrition
Find alternative route through friendly/neutral land
Or secure military access rights first

How to Execute:

Option A: Find different route

• Use diplomacy map mode
• Route through allied territory
• Longer but safer

Option B: Get military access

• Diplomacy → Target nation → Request Military Access
• Costs diplomatic power
• Allows safe passage

When to Use:

• Marching to distant war
• Multiple route options available
• High attrition in direct route

Terrain Types

Impact on Attrition:

Safe Terrains:

• Plains: +0% (baseline)
• Farmland: +0%
• Coastal: +0%

Moderate Terrains:

• Forest: +0.5%
• Hills: +1.0%
• Marsh: +1.5%

Dangerous Terrains:

• Mountains: +2.0%
• Desert: +2.5%
• Jungle: +2.0%

How to Use: Check terrain type in province panel, select in tool

Army Maintenance Level

What It Is: Your current military upkeep spending

Where to Find: Military panel → Army Maintenance slider

Impact:

• 100% maintenance: +0% attrition (optimal)
• 75-99%: +0.5% attrition
• 50-74%: +1.5% attrition
• 25-49%: +3.0% attrition (very bad)
• 0-24%: +5.0% attrition (catastrophic)

Rule: ALWAYS keep at 100% during wars

Supply Depot

What It Is: Special building that reduces attrition

Effect: -1% attrition in that province

When to Check:

• If province has Supply Depot building, check the box
• Check in province building list

Worth Building?:

• Yes, if it's a frequently-used supply route
• Yes, if it's your main army staging area
• No, if just passing through once

When to Use

Scenario: Planning a long march through 5-10 provinces

Example: Vienna → Budapest → Belgrade → Sofia → Constantinople

Benefit: See which specific province is most dangerous

How to Use

1. Click "🗺️ Multi-Province Route Analysis"
2. Click "+ Add Province" for each waypoint
3. Enter supply capacity for each
4. Click "Calculate Risk"

Tool Shows:

• Province 1: ✅ Safe (-1.2%)
• Province 2: ✅ Safe (-0.8%)
• Province 3: ⚠️ Warning (-6.5%)
• Province 4: 🔴 Danger (-11.3%) ← BOTTLENECK
• Province 5: ✅ Safe (-2.1%)

Result: Province 4 (Sofia) is the problem. Split armies before reaching it.

Mistake 1: Not Checking Supply Before War

Problem: March army blindly, discover attrition too late

Solution:

• ALWAYS use this tool before declaring war
• Check supply on F9 map mode
• Plan march route in advance

Mistake 2: Ignoring Winter Penalty

Problem: "It's just winter, how bad can it be?" (Very bad)

Reality: Winter adds +3% attrition = 1,200+ extra casualties/month

Solution:

• Check season before marching
• Wait for spring if high attrition
• Winter wars only if necessary

Mistake 3: Marching Full Stack Everywhere

Problem: "I need my entire 60,000 army together"

Reality:

• No province supports 60,000
• Massive attrition in every province
• Army arrives at 40,000 strength

Solution:

• Split into 2-3 smaller armies
• March separately
• Reunite before battle

Mistake 4: Low Maintenance During March

Problem: "I'll save money by lowering maintenance while marching"

Reality:

• Attrition increases dramatically
• Saves 20 ducats, loses 3,000 troops
• Troops cost much more to replace

Solution:

• ALWAYS 100% maintenance during active campaigns
• Only lower during peacetime
• Budget for war expenses

Mistake 5: Not Splitting When Recommended

Problem: "Tool says split, but I'll risk it"

Result: Lose 30% of army, lose the war

Solution:

• Trust the math
• Split armies as recommended
• Reunite before battle
• Better safe than sorry

Tip 1: The Bottleneck Rule

Concept: Your entire route is only as safe as the WORST province

Strategy:

• Find the lowest supply province on your route
• Calculate for that province only
• If bottleneck is safe, entire route is safe

Time Saver: Don't need to calculate every single province

Tip 2: Split Before Bottleneck

Smart Strategy:

1. March full army through safe provinces
2. Split before reaching bottleneck
3. Pass through bottleneck separately
4. Reunite after bottleneck

Benefit: Minimize time spent split

Tip 3: Coastal Routes Are Safer

Why:

• Coastal terrain has 0% penalty
• Ships can supply armies
• More strategic options

Strategy: Route through coastal provinces when possible

Tip 4: Build Supply Depots in Strategic Locations

Best Locations:

• Border crossing points
• Frequent invasion routes
• Mountain passes
• Major cities

Long-Term Benefit: -1% permanent attrition reduction

Tip 5: Pre-Position Armies

Concept: Move armies to staging areas during peacetime

Strategy:

• Move to border provinces 2-3 months before war
• Use low-attrition season (spring/summer)
• Ready to invade immediately when war starts

Benefit: Skip dangerous winter marches