4 March

Events that occurred on 4 March.
== In Arda ==
* T.A. 3019:
** Gandalf and Erkenbrand show up and finish the Battle of the Hornburg.
** Théoden and Gandalf set out for Isengard with a guard of twenty Rohirrim. They pass the tombs of the Fords of Isen.
** The River Isen is restored to its original course.
** Frodo, Sam and Gollum reach the slag-mounds on the edge of the Desolation of the Morannon.