The following rules apply to Cavalry:
Split Profile
Although a cavalry model has two sets of characteristics, one for the rider and one for the mount, it is treated in all respects as a single model – the rider cannot dismount. When moving, the cavalry model always uses the Movement characteristic of the mount, and never that of the rider.
The rider and mount use their own Weapon Skill, Strength, Initiative and Attacks characteristics when they attack. Each can attack any opponent that the cavalry model is in base contact with.
The mount's Leadership is never used, unless a spell or special rule states otherwise.
If the rider has a missile weapon, they always use their own Ballistic Skill, rather than that of their mount.
When attacking a Cavalry model, always use the highest Weapon Skill, Toughness and Wounds value from either the rider or the mount.
If the rider and the mount both have armour saves or ward saves these may be combined as normal.
Any equipment or magic items the model might otherwise have only apply to the rider, not the mount (unless specified).
Any effect that would modify the model's Characteristics affect both the rider and mount, unless specified.
In some cases, you may find Cavalry models that do not have a split profile. In this case, treat the model as single entity that may make up to two supporting attacks. The model also counts as mounted for the purpose of using certain weapons, as described in the Weapons & Armour chapter, but counts as a model on foot for the purposes of using Parry.
Ranks
A unit of Cavalry is required to be five or more models wide in order to have a complete rank.
Supporting Attacks
A Cavalry model can make one supporting attack from the rider, and one from the mount. Cavalry without a split profile can make up to two supporting attacks.
Special Rules
Cavalry are subject to the following special rules: Impact Hits (1), Swiftstride.
Note that the Impact Hits are resolved at the Strength of the mount, not the rider.
Any special rules listed for Cavalry units only apply to rider, unless they specifically mention the mount. There are, however, a few exceptions. If either the rider or the mount has one of the following special rules, then the whole model has it:
Berserk Rage (see Frenzy)
Terrain
Cavalry have to take Dangerous Terrain tests if they move march, charge, flee or pursue over anything other than open ground or hills – Battlefield Terrain for more details.
Unit Strength
Cavalry have a Unit Strength of 2.
Line of Sight
Cavalry have a Line of Sight value of 2.