My Lands: Black Gem Hunting

Mercenaries.

When mercs involve in a fight regardless of attacking or defending.
Do 100% of mercs die ONLY after inflicting damage? Or some of mercs die BEFORE inflicting damage thus only some mercs live to do damage and then die.

Could you please share your insight…

as a rule mercenaries first inflict damage and then die (or not). However there might be a great number of different factors (like some part of troops not taking part in battle) which can change the battle outcome.