Yet things might have gone far otherwise and far worse. When you think of the Battle of Pelennor, do not forget the battles in Dale and the valor of Durin’s Folk. Think of what might have been. Dragon-fire and savage swords in Eriador, night in Rivendell. There might be no Queen in Gondor. We might now hope to return from the victory here to ruin and ash. But that has been adverted — because I met Thorin Oakenshield one evening on the edge of spring in Bree. A chance-meeting, as we say in Middle-earth.
(The Return of the King, Appendix A)