That would require Star Wars reaching the Halo Rings in time before they go off. There were a total of 18 total Halo Rings, the original 12 of which could fire in a linear pattern and be used as intergalactic artillery. Their energies ignored space and time, meaning they would cross intergalactic distances instantly. Nothing can run or hide from it short of hiding in another dimension. The Star Forge is a factory. That's it, and not a very good one either if you ask the Forerunners. It is powered entirely by a single yellow star, which the Forerunners wold find to be highly inefficient. Forerunner power plants and reactors operate by committing cosmic vampirism; they siphon off the energies of other universes, destroying them, and converting their energy into power for all of their technology. The Forerunners, when beaten down and near extinction, were fielding fleets with "only" 700,000 warships apiece; their industrial strength is second to none. Read: [quote] The Sharpened Shield is roughly 300 million km in diameter with a G2 type star slightly smaller than Sol at the core, with a volume of roughly 7 septillion km^3 she boasted a habitable surface area of 255 quadrillion km^2 (some 550 million times the surface area of Earth). Assuming the Shield has a paltry 2 km thick shell the overall volume of the structure would equal 282 quadrillion km^3 of material (which assuming it had a density of iron would weigh more than the sun itself); even if Didact began construction of the project immediately following the end of the Human-Forerunner war and it continued up until his exile in an 8,000 year time period as a lower limit the Forerunners would have to assemble 1,120,716 cubic kilometers of material per second. [b]To put it into accepted SW-vs-ST parlance, that's the equivalent of manufacturing the second Death Star every five minutes, non-stop, for nearly eight thousand years - or stripping away an Earth sized planet every nine days[/b]. And despite this gargantuan effort the Shield wasn't the only of of its kind, many more were built and hidden across the galaxy - and to add insult to injury not only was this a secret project, it was swept under the rug by Faber because he preferred the Halo Array. [/quote] This is what they can accomplish with a low-budget proof of concept project that didn't pan out. The Star Forge is pathetic by comparison; if it was even a fraction of the industrial might of the Forerunners, the Sith would have overrun the Republic in a week. Forerunner warships can destroy planets by accident. Precursor Star Roads can destroy planets and induce supernova just by passing through. The Vong would be cannon fodder to the Flood at their height. An all biological civilization? Sign them right up. Darth Nhilius only killed one planet; no Force User was ever able to destroy entire quadrants. Do you even know what that means? It means they destroyed 1/4th of the galaxy. The best a Force User ever did was cause an unstable star to explode by channeling his power through a special device designed to give the user god-like abilities. To the Forerunners, destroying stars is Tuesday. The Mass Shadow Generator is a shittier Precursor Star Road. The Sun Crusher is a single fighter sized ship that can be captured in a constraint field and flung into slipspace for eternity. Or the Precursors could just hack Star Wars FTL and cause the Sun Crusher to jump into an incomplete universe, as they did to the Forerunners. Mandos are irrelevant. This won't be won by Spartans, but by the literally unstoppable Precursors and their contemporaries.