activate a trigger when a given number of persons is present?

[FLv*VeNoM*]

Howdy people,

I'm working on a mission with lots of infantry on both sides. The objectives are to clear a town and hold it against a counterattack.

I don't want to use the 'not present' setting, as it would make the mission veeery long since the counterattack consists of several tanks and a whole platoon of infantry, hunting down survivors would take far too long.

Is there a way to have a trigger activate when the enemy has been decimated to a certain number? like when 3/4 of them are dead the task is considered complete?

I think I've read something about that, but I couldn't find anything here.

thanks for your help in advance guys

[Demonized]

trigger opfor present
cond:

({alive _x} count thisList) <= 5

on act:

hint "only 5 or less opfor units left alive inside trigger area"

Note: this will count vehicles also as 1 regardless of how many crew members was inside.
so a tank with 3 crew members and 4 infantery units will count as 5 in this trigger condition.

[FLv*VeNoM*]

Damn that was a fast one!
And it works, thanks man! you helped me alot.