For some reasons, I always get confused about the writing of this word. Even for the month "March", I need to check on Google every time.
That does not help White March includes snow trolls and that its most difficult battle is located in a bog.
It's called MARCH (like that month) and has nothing to do with marsh/bog. Mowgrek Ien isn't even located in the WM, but in the Dyrwood
https://www.thefreedictionary.com/march
march 2
(märch)
n.
1. The border or boundary of a country or an area of land; a frontier.
2. A tract of land bordering on two countries and claimed by both.
intr.v. marched, march·ing, march·esTo have a common boundary: England marches with Scotland.