- The Brennen Center for Justice made a downloadable spreadsheet containing information about martial law events in the United States. It is part of a larger analysis of martial law.
- Martial law has been declared at least 68 times in the United States. This guide explains when, where, and why.
- Clay County, Minnesota (data.census.gov)
Clay County, Minnesota has 1,045.2 square miles of land area and is the 19th largest county in Minnesota by total area. Clay County, Minnesota is bordered by Becker County, Minnesota, Richland County, North Dakota, Wilkin County, Minnesota, Norman County, Minnesota, Cass County, North Dakota, and Otter Tail County, Minnesota.