How did Apollo punish Achilles and agememnom?

Apollo punished Achilles and Agamemnon by sending a plague to the Achaean camp during the Trojan War. This divine retribution was a response to Agamemnon's dishonor of Apollo's priest, Chryses, by refusing to return Chryseis, his captive. The plague ravaged the Achaean forces until Achilles, angered by the suffering of his men and seeking to confront Agamemnon, intervened to address the situation, which ultimately set off a chain of events leading to further conflict and tragedy.