Place it just before the moment your plan fails for lack of healing, then follow it with Enemy Spotted to show the threat that followed, and finish with Okay Let's Go once a monk finally arrives to turn the fight around.
About this sound
This is a short French voice line from Age of Empires II, taunt eighteen, in which a speaker plainly asks for a monk, repeating the request with insistence. It feels impatient, demanding and slightly comic, like a player who has run out of patience while waiting for support. The line comes from the game's French taunt set, used to request a unit during play.