Legends of the DC Universe
No. 30 - 32 "The 18th Letter"
Alcmaeon was an immortal and ruler of a small country called New Vladonia. He was the advocate of a war that was killing the people of his country and was asked to stop. The only way he would agree to a cease fire was if he had one night with Diana. After much contemplating, she agreed. Clark expressed his concerns about Diana compromising herself, so much so that he left Lois in the middle of the night to spy on Diana's date with Alcmaeon. In the end, Alcmaeon stopped the civil war and chose to die for Diana for he had fallen in love with her. Diana was disappointed with Kal that he did not trust her judgement and integrity.