Halo would have no knowledge of the force. Both worlds would be at a huge surprise to one another's abilities.
English
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The force doesn't work on extra galactic life such as the Yuzan Vong. The only way to use the force against them would be to pick up a rock and hit them with it force push/pull do nothing directly even battle meditation to find out where the enemy will strike and in what numbers doesn't work.
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[i]The Force wouldn't be enough to protect them from the star roads. Without the Halos, there's no defense. [/i]