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Redemption® Rulebook > Diagram of a Turn > Battle PhaseSide BattlesCertain cards cause two characters to fight each other in what is referred as a side battle. An example is Troops Discharged, a gold brigade evil enhancement that reads, "Select two Evil Characters in play to fight each other." This immediately requires two characters to fight a new battle. The original battle is temporarily suspended until the side battle is completed. The side battle is still part of the same Battle Phase because the main battle has not yet concluded. After the side battle is resolved, all surviving characters return to their previous locations. Non surviving characters and their enhancements are discarded. Surviving characters that return to the main battle bring their enhancements to the main battle. Any ongoing effects of special abilities are applied (e.g., immunity) to the main battle unless that special ability was exhausted in the side battle (e.g., a draw a card). Rules for initiative in the original battle resume. Only one side battle may be initiated by a player each turn.
This is a request that the new REG clarify the last bolded statement based on the answers to the following questions:
No. Your opponent in all cases controls King Rehoboam and can choose whether to make a side battle occur, so you are not initiating the side battle. All of these are legal.
Actually, the nice thing about King Reho is there's no "may" start side battle.