The event
The exiled Dúnedain establish the two kingdoms in Middle-earth.
Consequences
Gondor and Arnor become the great bulwarks against Sauron in the Second and Third Ages.
Participants
Place
Sources
The Silmarillion · 1977
Posthumously edited. Contains the Ainulindalë, Valaquenta, Quenta Silmarillion, Akallabêth and Of the Rings of Power.
The Lord of the Rings · 1954–55
Three volumes: The Fellowship of the Ring, The Two Towers, The Return of the King.