It was originally incorporated as a rural municipality on November 1, 1890.
[1] It ceased on January 1, 2015 as a result of its provincially mandated amalgamation with the Town of Deloraine to form the Municipality of Deloraine – Winchester.
[2] The former RM is located in the southwestern part of the province, on its border with the state of North Dakota in the United States.
[3] According to Statistics Canada, the former RM had an area of 725.58 km2 (280.15 sq mi).
A portion of Manitoba's Turtle Mountain Provincial Park is located at the southeast corner of the former RM along its border with North Dakota.