In the Spring of 1974, several law enforcement officers* from the Bangor, Maine (USA) area met and and formed a small, local motorcycle club.  The rest, as they say, is history. 
Soon, Blue Knight chapters were being formed in Massachusetts, New Hampshire, and beyond.  With the addition of Canada, and later Australia, the Blue Knights became an international organization. 

*Our Founding Fathers are: Joel Rudom, Bill Robinson, Doug Minor, Ed Gallant, Mike Hall, Chuck Gesner, Wayne Labree, Chuck Shuman