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I suggest adding a mod for all the Campaigns in Warlords. But then, the animation of the Imperial Archers in the introductory video (the battle between the knight and the demon) of the first campaign needs to be fixed, as it doesn't work with UNIT.
A mod for the campaigns from previous expansions is very useful; I use it myself. However, "UNIT" is not a collection of modifications, meaning it won't include everything that isn't related to the original concept of this project.
Regarding compatibility, I can say the following: during the development of this modification, I tried to optimize everything in such a way as to make "UNIT" as compatible as possible with other mods. However, it is simply impossible to take into account and adapt to all the features of third-party mods, so this was not the primary goal (it is stated in the topic header that conflicts may arise when installing with third-party mods). In addition, development is already complete; now, only a hotfix is planned, which is designed to rid users of unforeseen errors in the modification itself. Unfortunately, this does not extend to compatibility with third-party modifications.
In conclusion, I can only note that the introductory video for the "Isabelle's Campaign" works together with "UNIT"; there is just a slight delay in the animation of the Imperial Archers' shooting, which, in my opinion, is not critical.