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The Supply Wagon is an unarmed unit used to support troops outside of their nation's borders. It protects units from taking attrition damage and decreases the reloading times of nearby siege and artillery units. The Supply Wagon becomes available at the Siege Factory once a nation has entered the Medieval Age and it costs both Food and Timber to create.
Effect and use of Supply Wagons Edit
Units moving or fighting in enemy territory without a Supply Wagon nearby often suffer from attrition damage (red glow under the unit) and eventually might even die of it. Note, that the strength of attrition damage may vary, depending on age, attrition tech level (researched at a Tower), wonders and nation. Also, a few units, including the Supply Wagon itself, are immune to attrition damage.
Siege and artillery units outside their own nation's borders are considered 'out of supply', when not within the range of a Supply Wagon. They reload and fire at a much slower rate, with early ages siege units (Catapults and Trebuchets) reloading at 66% of normal speed and artillery units from the Gunpowder Age on reloading at 50% of normal speed. Hint: When an artillery unit is selected, a small icon in the status bar indicates, if it's 'in supply' or 'out of supply'.
Supply Wagons counter these two negative effects, thus are especially indispensable for assaults on cities and other long term military operations in enemy territory. However, Supply Wagons are somewhat expensive due to their high ramping cost and bringing two or three Supply Wagons with every army is usually more than sufficient.
Also note that a Supply Wagon can only supply units of its own nation – not allied units.
Destroying a Supply Wagon yields a one-time bonus of 50 Wealth.
Upgrading Supply Wagons Edit
Supply Wagons cannot be upgraded directly, but some of their stats can be improved by researching Forage, Supply and Logistics at the Smelter. Each upgrade increases the Supply Wagon's hit points (+20 per upgrade), range (+2 per upgrade) and movement speed (roughly +15% per upgrade).
When a nation enters the Industrial Age, all its Supply Wagons automatically become more modern cargo trucks (somewhat resembling the M35, an American 2½ ton cargo truck). The unit's stats, however, remain unaffected from this upgrade.
Healing effect Edit
The Versailles wonder adds a healing effect to Supply Wagons, allowing them to slowly heal/repair units within their range. Only land units of the same nation are affected, while ships, aircraft, buildings and allied troops all are excluded from the effect. Also, a Supply Wagon cannot heal itself or other Supply Wagons – they still have to be garrisoned inside a City, Fort or Siege Factory in order to be repaired.
Healing occurs at a rate of one hit point per 1.33 seconds and a green glow appears beneath receiving units every time a hit point is healed (similar to the 'red attrition glow'). The effects of two or more Supply Wagons do not stack. The healing rate is fairly low – fully restoring the hit points of early ages infantry or cavalry might take up to four minutes. However, the effect is usually strong enough to heal most damage done by minor raiding parties, artillery weapons, towers and cities.
French Supply Wagons have an innate ability to heal nearby units at a rate of one hit point per 1.33 seconds. Owning the Versailles wonder doubles the healing rate to one hit point healed per 0.66 seconds, which essentially halves the total healing time of units.
Unit Costs Edit
Unit production cost increases progressively with every Stable unit on the field or currently in production. The default increase is of 40 Food and 40 Timber for the second unit created, increasing further with every new unit until the cost cap is reached, which for Support Units is +200% of their original base value. It's important to note, however, that these prices are the default standard, and actual production and upgrading costs may differ, depending on researched technologies/ages, connected rare resources, or adopted governments.
- In addition to the healing effect mentioned above, the French receive a free Supply Wagon with every Siege Factory they build, even before Medieval Age. However, they still have to advance to Medieval Age before being allowed to create additional ones at the factory.
- Russian cavalry units get an additional 25% damage bonus, when attacking enemy Supply Wagons and artillery.
- The Dutch recruit Armed Supply Wagons instead.