So the wall paper in the room is called https://www.fox43.com/article/news/local/contests/york-wallcoverings-designs-delivers-wallpaper-to-white-house-oval-office/521-5c57d9c3-c013-4e28-87fa-f163a7a75cb7
Then you have 1871
Battle of yorktown.
If these are clues then everything needs a second/third glance. We've missed alot, or at least I have.