Chaining

Chain a province taking a lot of his land is the most destructive action against some province. A lot of things can be done to maximize this damage.

Chain recipe

1 - MV to remove magic shield, greater protection, minor protection, Town Watch and Reflect Magic (4 correct attempts or spells removed)
2 - Nightmares (at least 15 up to 45) (-20% to 50% of enemy´s troops)
3 - Pitfall, greed and explosion.
4 - Raze from provinces much bigger can be used if wants to drop the province NW or to remove GS, forts and hospitals. 
5 - Great Arson if the enemy has great amount of Guard Stations, Forts and maybe Hospitals (leaving him with no more than 7% of each build)
6 - Undead can attack to plague the enemy
7 - Orcs attack with bloodlust
8 - The rest attack till the enemy drops his NW out of our range.
9 - Ambush every attack he makes!

When to stop?

The attempt to overpopulate a province must be done quickly and accurately and takes place in three moments.

1 - From the moment we start attacking the province until the moment your troops return home with land.

It is very important we ambush all the land taken from the chain target at this moment

2 - From the moment the province had its troops returned, release what he needs to make an attack, until the moment that this second attack returns.

We still managed to overpopulate this province, but we should no longer ambush this second attack.

3 - As soon as the second attack returns home, this province becomes what I call "waste land".

From now on this province is an underpop target, that can be used by our deeply chained provinces to recover some land.

Who to chain?

There are several things we can take in consideration on who to chain
 - One option is choose provinces that have high offense and small defense like pure attackers. The good think of this choice is that we can easily break them, and if we do a good chain he will need to release his offense due lack of land.
 - The other option is take a sitting duck province (like faeries). The bad thing is that provinces has high defense, so is dificult to break them. The good thing is that once he is puted down this kind of province can´t get back the land, since he is not good attacking.
 - Undeads are bad to chain. One chain on an undead can spread the plague on our entire KD, needing to waste runes and mana with nature blessing. Also undeads can´t be plagued.
 - Provinces with high percentage of GS or Hospitals will demand more from our thieves casting Great Arson on it.
 - Also if the enemies elites are at home or aways makes the chain have different characteristics. You can see it here.