Military Unit Types, Promotions, and Strategies for Brave New World
This Guide covers all Military Unit Types in Civilization 5 Brave New World. UUs are covered elsewhere: Click to learn about Unique Units in Civ 5. All UUs are special variants of these Units, so it is not necessary to cover them in two places.
Siege Weapons are an important part of Warmongering in Civ 5. Without them, it is difficult to break through a City's defenses to capture it. If playing peacefully, you can ignore them and use Ranged instead. However, when it comes time to take Cities, even the lowly Catapult is capable of dealing damage to Cities with much, much higher Combat Strength thanks to their innate Bonus vs Cities. Every unit on this list has a +200% bonus vs Cities, which can be additively boosted another 50% with the Volley Promotion, unlockable after getting one rank in Accuracy or Barrage.
The drawback to all Units on this list save the Rocket Artillery is that they must be set up to Fire. This consumes one movement point, so it is almost never the case that you are able to move into range to hit the City then immediately fire unless it is a City settled within 2 tiles of your Borders and there are Roads. Artillery changes that, for it has a range of 3 - a significant leap in power that changes the pace of War substantially. Many players rush to the Dynamite Tech after developing a strong Scientific Civ, then go on a rampage with Artillery and win Domination Victories.
As with Ranged Units, after acquiring Accuracy or Barrage III, Siege Weapons are able to get an extra attack through Logistics and also acquire +1 Range Promotions. This makes them lethal to opposing Civs' Cities, so long as you keep them alive by protecting them with Melee and Ranged units.
Siege Units have a 200% Combat Strength bonus vs Cities
The Accuracy/Barrage Promotions themselves do not help against Cities, but rather against Units in those Terrain types. Since Units in Rough Terrain are harder to kill because of the tiles' defensive bonuses, it is smart to go with Barrage to deal more damage to units in that type of terrain and help eliminate them when your army is on the move. It will also help protect the Siege Units when they are defending on those types of tiles, such as when positioned on a hill to avoid line of sight issues when attacking a City.
In the list below, the first number under Combat Strength is the Unit's Ranged Attack CS, the second its defensive CS.
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