I just finished writing the tag wiki info for the wwi tag, which only had 6 questions associated with it, which seemed odd. Then I saw a question about WWI that wasn't on the list for the tag I had been working on, and I realized that there are two different tags for the same war - wwi and ww1.
Although it sucks that my efforts were wasted, it seems like we should merge the tags, and make one of them a synonym for the other. Although I feel that wwi makes more sense than ww1, because in my experience, the former is used more often than the latter, I don't care which tag becomes a synonym of the other, or gets merged into the other. The important thing is that one of the two tags goes away.