There is an unusual situation with annexing Holstein while there are partisans present will cause you to loose that province to Baden. Playing as Prussia, annexed Holstein while one of their provinces was in combat with partisans and my troops. That province then became part of Baden, which was not part of the war, did not border Holstein but did have a defensive alliance with Prussia. This happened for either or the two Holstein provinces which had partisans, in combat with my troops or not. If there are no partisans present, annex worked as it should in that the two provinces became part of Prussia. Repeatable.
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