Who: Xarus Troops and whoever wishes to find them. Where: New York City When: Early Morning. Why: Declaration of war against The Justice League, Justice Society of America open: Yes to any Justice League, Justice Society of America member
Xarus couldn’t find where the base of operations for the Justice League was at so he had one of his people followed Ted Grant aka Wildcat to the Headquarter of the Justice Society of America. He thought if he attack the JSA it would bring the JL out of hiding.
So he sent a army of vampire to attack them about the same time Bloodlust attack the Xavier Institute for Higher Learning for he had other places to be when those attack went down as well.