As mentioned at the top of the changelog: Crescent Hills (it's just to the right of the Manor on the war map) :)
If you have found Crescent Hills, but can't fight there, it's because you haven't talked to Jessica as your lead suggests. You can find her in the gardem.
If you don't even have access to the War Room yet then you need to find Jessica first. She can be found in the bathroom on WEDNESDAY MORNING and at the front door on SUNDAY AFTERNOON. The next update (next week) will add a lot more spawn locations to make her much easier to find.