http://stinet.dtic.mil/cgi-bin/GetTRDoc?AD=ADA446973&Location=U2&doc=GetTRDoc.pdfTake a look at the above document, you won't believe it, but there it is on a military system, unclassified, and approved for unlimited distribution.
Fusion propulsion system (dense plasma focus), aneutronic (they don't say what fuel is used, hydrogen-boron, he3, etc), with gigawatts of excess power available for electricity to power some incredible devices including time-altering and gravity-altering devices, ultra high power lasers, dense plasmoid beam weapons, etc.