Now if you fight a legion with 251 remaining health, it leaves exactly 1 remaining health point! However, this legion splinter must still be attacked with many villagers in order to have a 100% chance of victory. This is absolutely inefficient and means a huge waste of attack resources!
Remember that the main reason for attacking legions is for the resistance points (RP) earned. The number of RPs earned depends on the health removed from the legion by the attack. Removing N health points gives ? [note 1] resistance pointsRP. So removing 1 health point gives 1 RP for this attack, but the attacker still used several villagers which all lost the same amount of strength that they would lose removing maximum health points. The villagers would also lose 1 duration off their weapons, shields and helmets.
It doesn't break any rules, but it's unfair to the village owner or guild members who have to waste their resources on it!
2. In some cases some players wish for a legion shall reach their village (eg. when achieved resistance level 10 and want to gather the rewards for reaching the resistance levels again). Since there is still no "'flag" ' implemented where a village can tell other players NOT to hit legions of this village there is a common practice(just working with resistance level 10):
The first attack on the village legion must be carried out by the village itself. Then the legion's health is no longer 2,300 and all players know that this legion can be attacked. If you see a legion with full health (2,300) that legion should NOT be attacked.
Some guilds / players seem to have a rule also for smaller legions that only the village owner should hit an 'untouched' legion, i.e. a legion whose current health is 2300, 1900, 1800, etc.
===Planning your attacks===
If you are planning to completely finish off a legion's health by hitting it yourself, and are not expecting others to hit it, then you could avoid your final hit being inefficient by 'pacing' your attacks. You don't need to think about thiswhen this when starting off hitting a legion that has a lot of health such as 1,600+.
When the legion gets to lower health e.g. 800 and your maximum possible attack strength is e.g. 250, then you could hit it three times, removing 250 health each time, but then the legion would be left with 50 health. It would be more efficient, in terms of RPs gained for resources used, to attack the legion four times with a strength of approximately 200.
Of course there is always the possibility that some other player will attack the legion and spoil your plan.
There is a way to finish off a legion with low health <=50 without wasting villager resources.
That is to attack it with just Asterix or Obelix.