march 2 
(märch)
(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·es
To have a common boundary: England marches with Scotland.
[Middle English, from Old French marche, of Germanic origin; see merg- in the Appendix of Indo-European roots.]