'M37-A is the official designation for the series of experimental thermonuclear bombs and affiliated launching devices presently designed and operated by the Military of Kanvers. The development project, codenamed Project Invision" commenced in February 2005, and the first fully-functioning device was tested on November 17th 2008. The launching mechanism has since been modified and the new version tested in early 2010. As of 2011, the Government of Kanvers has confirmed that three operational M37-As presently exist, one of which will be test-fired "in the near future".
The units are rumoured to be up to four times as powerful as standard nuclear weapons, and have not yet been officially sanctioned by the World Assembly.