Wine is one of 31 Rare Resources in the game and, if present on a map, available from the beginning. It appears as a small vineyard with green vines and several stakes (so called 'trellis'). Like all rare resources on land, Wine can be gathered by sending a Merchant from the Market to the resource location. Wine provides the following benefits to the nation:main article. Also note, that Knowledge is not gathered before the Classical Age, with one exception: The Greeks may gather Knowledge from the beginning, making an early exploitation of this resource more useful.The cost reduction affects all unit upgrades at the Barracks, Stable, Siege Factory, Dock, Airbase and Missile Silo, but it has no effect on the upgrade cost for Generals/Spies at the Fort. It is also cumulative with cost reduction bonuses granted from resources like Salt, Horses, or Sulphur.