"The Huron mercantile monopoly permits you to get approximately 1 Mantlet for every 2 minutes of game length, up to 30 minutes."—In-game description
Huron Trade Dominance is a technology in Age of Empires III: The WarChiefs that can be researched at a Trading Post built on a Huron settlement. Once researched, one Huron Mantlet for every two minutes the game has passed, up to 30 minutes (for a total of 15 Huron Mantlets), will appear in the Home City shipment point.
Despite its significant cost, Huron Trade Dominance allows the player to save 350 wood and 1,100 coin if researched on the 30 minutes mark. French and Iroquois players can also ship Huron Mantlets from their Home City through the Huron Allies cards, making this technology not very useful for them (although if they are tight on coin, this technology should be preferred instead).