The domain name .Mil is the sponsored top-level domain (sTLD) in the Domain Name System of the Internet for the United States Department of Defense and its subsidiary or affiliated organizations. The name is derived from military. It was one of the first top-level domains, created in January 1985.
The United States is the only country that has a top-level domain for its military. Other countries often use second-level domains for this purpose, e.g., mod.uk for the United Kingdom's Ministry of Defence. Canada uses norad.mil with the United States as they jointly operate the North American Aerospace Defense Command.
