Many of these events were current news or recent history at that time and reported in newspapers and taught in school. So it wouldn’t be likely for 21st century people to be familiar with these events.
Settlement of Georgia, the transfer from Dutch to English, and the Jay Treaty were “recent history”? No, they were ancient history. The Jay Treaty being most recent being from John Jay’s efforts 1790s, and something all Americans should be somewhat aware of (including perhaps the fact Jay was the first Chief Justice). That’s like us discussing the awful adoption of the Income Tax and making the Senate just another “people’s representaion” in the Amendments.