Woah woah there slo down guys!
In a high orbit of multiple thousand kilometers over Musavi, traces of dimensional energy can be found - specifically, slipstream energy. These traces rapidly opened to form a large rent in realspace - Slipstream. Out of this, a small patrol group appeared, and it seemed regular, however upon closer inspection, the men watching looks at the drives. The drives have changed, significantly. For starters, it doesn't look like the particle stream coming out of the engines is ionized. Not an ion thruster, nothing much until one discovered extremely high energy bursts inside the nozzle of the thruster.
Beyond fusion. Beyond even muon-catalzyed fusion that could give you multiple thousand terawatts of energy. This was something more. These bursts come from a material that has been the staple of science-fiction to explain energy requirements. The material that all of Musavi knows only too well.
Antimatter.
(Whoops I may have added antimatter engines)