It is located in the extreme south-west corner of the province in the Westman Region.

The rural municipality's name is a reference to its location abutting Manitoba's western border with the province of Saskatchewan and Manitoba's southern international border with the American state of North Dakota.

The municipality was created on January 1, 2015 via the amalgamation of the RMs of Albert, Arthur and Edward.

1351, crosses Graham Creek about 3 kilometres (1.9 mi) west of Melita.

It was constructed in 1927 by John Kenward and Company for $6,443 and is on the Canadian Register of Historic Places.