When do bases that have charged into contact with the enemy fight their first round of melee?
Bases that have charged into contact with the enemy fight an immediate round of melee in the Charge sub-phase in which they first make contact with an enemy base. If the melee is not resolved in this sub-phase (i.e. neither side routs or is destroyed) they then fight another round of melee in next turn’s mandatory Melee sub-phase.