User blog comment:SayuriDarling/Full first chapter of The Mark of Athena/@comment-68.32.138.182-20120605223642/@comment-3146930-20120605231104

Athena isn't the goddess of battle, but battle strategy. So Athena is the one that would come up with an army's battle plans, like during The Last Olympian when she kept telling Zeus that Typhon was a distraction. Also, Athena is her father's favorite child so she most likely sided with him when he was like "Close Olympus," so combining the camps would also go against his orders and she may try and split them apart. While she may not be the goddess of battle, she may have a strategy to make them fight.