Some scenarios call for units to enter play as reserves. These units use the rules for reinforcements. The following additional caveats also apply:
Units that are not normally allowed to move (for example, if they contain models with a Movement characteristic of 0) are placed touching the battlefield edge.
Characters can choose to either enter the battle on their own or as part of a unit they have joined. If dice are used to determine when and where reserves enter, state if a character is joining a unit before making any rolls. If so, make a single roll for both character and unit.