MEANING... LOTS OF THINGS.
BUT IT DEFINITELY CONCERNS EVENTS TAKING PLACE IN THE THIRD OR SECOND AGES.
COULD BE ANYTHING FROM NUMENOR, TO GIL-GALAD, TO THE NORTHERN KINGDOM OF MEN ARNOR? THE EXILED DUNEDAIN SETTLEING IN ARNOR AND GONDOR? IT COULD BE LOADS OF THINGS.

— 𝕤𝕚𝕟𝕕𝕒𝕣 𝕡𝕣𝕠𝕡𝕒𝕘𝕒𝕟𝕕𝕒 (@tolkienthot) February 15, 2019