Ireland
through most of 17th c. the main settlers came from England with Wales and Scotland, Irish started to settle in the late 17th c.
We still use Roman numerals on things like clocks
Serbia supplied the rebels with weapons so that they could kill the archduke. Austria-Hungary declared war on Serbia. Russia entered to defend Serbia because they both had large Slavic populations. Germany entered to defend Austria-Hungary. Alliances drew other countries in until it was a world war.
The final solution was the Nazis' answer to a problem that they didn't have. It consisted of demonizing and persecuting people they didn't like, and then working them, starving them, and killing them. Roughly six million Jews died during the Nazi Holocaust.