733.1. Assault is a Passive Ability keyword.
733.1.a. It is present on Units.
733.1.b. Assault is formatted as "Assault [X]".
733.1.b.1. The X is referenced in the functional text of the ability.
733.1.b.2. The X is referred to as the Assault Value.
733.1.b.3. If X is omitted, it is presumed to be 1.
733.1.c. It is functionally short for "While I am an attacker, I have +X [M]."
733.1.d. Being an attacker means the Unit has gained the Attacker designation during Combat. See rule 437. Combat for more information.
733.1.d.1. Assault remains in effect as long as the Unit maintains the Attacker designation.