Hey, not familiar with the forum that’s actually my first post.
Just to let you know that there is an actual glitch/hack on the United States Civ with a mercenaries Card which give you 3500 Gold & 1 Xp leveling every time you click on it.
Video of that: AOE III Definitive Edition - Infinite XP & Gold with United States Civ (Bug/Glitch) - YouTube