User blog comment:Blackendedsoul/Might speculation/@comment-4352645-20130106105947

For the World Government, the most powerful group in the land, to consider the Revolutionary army a large threat is something to consider, as from what I've seen, a large threat is usually assigned to the likes of the Yonko, Whitebeard, and Gol D. Roger. Considering the power of these people/groups, it would be a good assumption to put the army on an even scale with them. But, if you want more "Proof" read on. Ivankov is on par with at least Bartholomew Kuma, and that is quite a large amount of strength. Considering his/her position in the army*commander* it can be assumed that there are multiple more people in the army that are on par, if not stronger than, Ivankov, because there are multiple commanders in a common army. Not to mention, from what the rumors in the manga say, and the short instance that we saw Dragon use his power, it can be assumed he is quite powerful as well. I'd put them at the same level as a single Yonko crew, and possibly above, depending on what crew it is.