This page or section may need to be cleaned up to reach a higher standard of quality.
This may include editing to correct spelling and grammar, and rewriting sections to ensure they are clear and concise.
A Trade Route is a predetermined path in Age of Empires III that goes across the map, with Trading Post sites next to it where players can build to gather experience (or, if the Trade Route is upgraded, other resources).
Two upgrades are available for the Trade Route: Trade Cart, and Iron Horse, both of which upgrade the speed at which you gather resources. They also allows you to choose Food, Wood or Coin from the Trading Posts, rather than Experience.
Note that upgrading the Trade Route will increase the gather rate for ALL players for that Trade Route, not just the player or their allies.
Try to avoid upgrading the Trade Route at more than one of the Trading Posts at a time, or upgrading while your ally does the same - the resources will be wasted.
Trade Cart - costs 200 Food and 200 Wood, replaces the Trade Route travois with a Stagecoach, increasing gather rate and lets the player receive other resources instead of experience.
Iron Horse - costs 300 Food and 400 Coin, replaces the Trade Route stagecoach with a train, increasing gather rate.
A Trade Route is the route units follow from a trade building to another. Players should establish fortified structures and train military units around these routes to protect their caravans from enemy rushes. Trade Routes are an infinite source of Gold.