No. A great deal more than that would be necessary. For one thing, the ownership of Chighu is temporarily transferred to one of several factions. If none of those factions still exist, the game would crash. There a number of reasons why it was written as it was: making the invasion active for more factions significantly increases its complexity and may have very serious side-effects.
The author of this script had years of experience. Do not try re-writing this script at home.
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