Not true. At least according to some of the Nostradomus scholars. The 3rd A-C (Napolean, Hitler the first two) is supposed to be killed early (30 days?) in the conflict that the A-C starts. However, the downside is that the conflict is supposed to last a really, really long time. Can't recall the details.
According to the Bible, the 3rd A-C is probably more accurately portrayed as Damien in Damien Omen, the movie. (Not everything in the movie, of course, is accurate.) He is supposed to rise up from a European country (the "little horn") and unite them. From my memory of what I read, he appears to be benevolent, disguising his evil. I believe he has powers, but they are not from God. The A-C fools the world about his plans for peace and everyone's welfare. Then conflict does break out. And, no, I don't believe he lives for very long, but I believe he's in place for longer than 30 days.