Join

Joining is a feature where a stack of wandering creatures are willing to become a part of hero's army for free or in exchange for gold. Whether or not the stack will join depends on several factors, but basically if hero's charisma value (C) is lower than creature stack's mood value (M) the creatures will fight. If charisma is greater there are three possible outcomes:

1. the stack will join for free,
2. the stack will join for gold, or
3. the stack will fight.

Calculation and factors

Mood values
M	Aggression:
-4	Compliant
1–7	Friendly
1–10	Aggressive
4–10	Hostile
10	Savage
Strenght values
St	k
11	k ≥ 7
2 × (k-1)*	1 ≤ k < 7
-1	0,5 ≤ k < 1
-2	0,333 ≤ k < 0,5
-3	k < 0,333
* rounded down
Diplomacy values
D	Level of Diplomacy
1	No Diplomacy skill
2	Basic level Diplomacy
3	Advanced level Diplomacy
4	Expert level Diplomacy
Sympathy values
S	Sympathy description
0	No creatures from the same town type.
1	At least one creature from the same town type.
2	Over 50% creatures from the same town type.

M > C → Creature stack will fight M ≤ C → Creature may join

C = P + D + S C is Charisma value P is Power value D is Diplomacy value S is symphaty value H = √(1 + 0,05 × A) × (1 + 0,05 × D) H is hero strength value
A is attack skill value
D is defense skill value AI is sum of all creatures' AI value A_TOT

External links

• Thread: Diplomacy internals on Heroes Community]