The "Example of a fleet battle" on page 7 of the rulebook states
If the purple fleet moves to the Ionian Sea, Purple can decide whether the fleet should fight. ... If Purple does not want to do battle, the purple fleet moves to the Ionian Sea. If, directly after this move, Yellow or Green do (typo?) not want to fight, all three fleets remain in the Ionian Sea. If booth (typo?) (green and yellow) fleets want to fight, the activ (typo?) purple fleet decides which one can do so.
Does this mean the battle can be declared only if defenders unanimously agree to fight when the active fleet/army does not?