Yep, we're getting closer all the time!
The last dated prophecy was the surrender of the holy lands to Israel, which was not the founding of the nation. According to Herbert W. Armstrong's book "The United States And Britain In Prophecy" the lands were surrendered to a British lieutenant exactly on time, and the nation was became a thing the next day. Mr. Armstrong traces the tribes through Ireland, Scotland and England, as well as several other places. You can search his book and download it for free.