Formation coherency

Formations must be coherent. A formation is coherent and its units are in coherency when both the following conditions are true:

• Every unit in the formation is no farther than 5cm from at least one other unit in the same formation.
• All units in the formation form a chain without any gaps of more than 5cm.

Sometimes the units in a formation will become separated due to enemy fire or assault and the conditions above are no longer true — the formation is incoherent and some of its units are out of coherency.

When you next take an action with an incoherent formation you must move to close the gap, so that it becomes coherent again (all units are in coherency).