"Crusaders of the Lost Mark" is the eighteenth episode of the fifth season of the animated television series My Little Pony: Friendship Is Magic.

Written by Amy Keating Rogers, it is one of four musical episodes in the series, alongside "Magical Mystery Cure", "Pinkie Pride", and "A Hearth's Warming Tail".

Diamond Tiara loses the election and is heavily criticized by her mother, Spoiled Rich afterwards, causing the Crusaders to sympathize with her.

Being one of Friendship Is Magic's four musical episodes, "Crusaders of the Lost Mark" features six songs, all of which were composed by Daniel Ingram.

[2] According to IMDb, "Crusaders of the Lost Mark" is the sixth highest rated episode of My Little Pony: Friendship Is Magic with a 9.2/10, following "Slice of Life" and followed by "Amending Fences".