Caravan is a technology in Age of Empires II: The Conquerors that can be researched at the Market once the Castle Age is reached. Once researched, it allows Trade Carts and Trade Cogs to gather gold more quickly by moving 50% faster. Having Caravan is very good way to gather gold in the later part of the game, when mine deposits are sparse or depleted, and also makes raids against Trade Carts less effective.