Who wins?
By entire, I mean EVERYTHING. Halo, for example, would have all of the Precursors, Forerunners, Covenant, Flood, and Humans all teamed up against ALL the Star Wars universe
They all have their technology as well. Halo has their Halo Rings and such, Star Wars has all their Star Destroyers and Death Stars and all that
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Also think of the numerical advantages that sw has over halo. The clone wars was literally two completely disposable armies fighting and the only way to end the war was for one side to kill eachother. And yes maby it would be different if every human had a spartan suit but they don't so winner is star wars