Everyone forgets fallen and cabal have the only means of air defense out of them all, the cabal could crush the fallen so then hive are no match for any species except the fallen they're even but fallen aha e air power, but cabal could withdraw their ground forces and air strikes the vex, which happen to be only a ground army and race
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The vex are the only ground force that can ignore physical walls and barriers however. Which is a major advantage of air superiority. The Vex also don't have real home bases that can be bombed by aircraft. This makes them an incredibly difficult race to win a war against.