The situation is this: a political void conflict is declared as player 1's first conflict. The void ring has one fate on it. Player 1 selects Otomo Courtier (-, 2) as the attacker. Player 2 turns the province face up, which is Rally to the Cause. The reaction on this card causes the conflict to switch type to military void. This causes a problem because the attacker has a '-' in military and cannot participate in the conflict.
Reading the rules carefully, the conflict is initiated and player 1 gains the fate token because the declaration, gaining of the fate token, and selection of the attacking character happen simultaneously. Then the province is turned face up and the conflict type changes to military.
So what happens next?
Does Otomo Courtier return to the home area because they cannot participate in the conflict? Or does the character remain in the conflict counting as a ready character?
Does play continue with player 2 declaring defenders and allowing player 1 to attempt to place a character into play during the Conflict Action phase?
Or did the conflict end at some point in time?