| Availability | Unit |
| Stable (imperial) | |
| Siege Workshop (castle) | |
| Siege Workshop (imperial) | |
| Siege Workshop (imperial) | |
| Siege Workshop (castle) | |
| Siege Workshop (imperial) | |
| Siege Workshop (imperial) | |
| Siege Workshop (castle) | |
| Siege Workshop (imperial) | |
| Siege Workshop (imperial) | |
| Castle (castle) | |
| Castle (imperial) | |
| Castle [+Elite] [Unique] (castle/imperial) | |
| Castle [+Elite] [Unique] (castle/imperial) | |
| Castle [+Elite] [Unique] (castle/imperial) | |
| Castle [+Elite] [Unique] (castle/imperial) | |
| Castle [+Elite] [Unique] (castle/imperial) | |
| Castle [+Elite] [Unique] (castle/imperial) | |
| Castle [+Elite] [Unique] (castle/imperial) | |
| Castle [+Elite] [Unique] (castle/imperial) | |
| Castle [+Elite] [Unique] (castle/imperial) | |
| Castle [+Elite] [Unique] (castle/imperial) | |
| Castle [+Elite] [Unique] (castle/imperial) | |
| Castle [+Elite] [Unique] (castle/imperial) | |