User blog comment:Blackendedsoul/Might speculation/@comment-3119203-20130106023943

We're going to have make a lot of assumptions about the Revolutionary Army in order to answer this question. We have not been given any indication on their numbers, number of commanders, or strength of their leaders. All we have right now is that Ivankov, a commander of the Revolutionary Army and figure close to Dragon, is on par with Bartholomew Kuma, but cannot stand up against Akainu or Magellan. The Revolutionaries also have the military might to overthrow countries (multiple ones at once), but as shown by Crocodile, this does not necessarily mean that they have a huge force. However, given the fact that 1) They are a homogenous group, unlike the pirates and 2)The World Government considers them a direct threat to the world's safety, they are probably quite strong. However, not much is known about their military, given the relative secrecy of their current operations. The fact that they haven't taken on the World Government yet indicates that they currently lack the might to fight them.

The World Government is far and away the most powerful organization in the world. If they weren't, they wouldn't be in power, would they? They have 170 countries under their control (a few less if we subtract those in revolution), have a naval force strong enough to police the entire world, and have numerous spy associations (even without CP9, there are 8 other Cipher Pol units). We also know that the navy is commanded by three men strong enough to take on Yonko (admirals) and several more who can match Shichibukai (vice admirals, take this comparison is not exact, it's the easiest way to judge their strength). Even when fighting one of the most powerful pirates in the world and his fleet of allied crews, they were able to come out on top. Sure, the Navy lost some power with Sengoku, Garp, and Aokiji, but Jinbe did mention that the Navy gained power with Akainu in power.

Now the pirates. For an accurate representation of the pirates, look no further than the Shichibukai. Some are lazy, some are greedy, some are selfish, and none of them want to work together. Whitebeard's coalition of pirates was quite honestly a miracle, and that's only because he was one of the most respected pirates of the time. Due to their lack of teamwork, unlike the Marines and Revolutionary Army, the pirates are not very strong. Even the crew of a Yonko would falter under the might of the World Government (who actually has the Shichibukai, some of the strongest pirates in the world, under their control, more or less), as Whitebeard's crew had to be bolstered by a lot (I think 48?) of notable New World pirates. Even at the height of the war, the Marines were withholding troops in underground tunnels, not to mention that Garp and Sengoku were hardly even fighting.

With all that said, here's my ranking of groups.

1) World Government and its various factions.

2) Whitebeard's Pirate Armada

3) Revolutionary Army

4) Yonko crews

5) Individual countries (Wano, etc.)

6) Various pirate crews.

Note that the Shichibukai are simultaneously considered part of the World Government and the pirate crews. If they choose to lend their power to the World Government, then they are part of that group, but they are also their own group. I am cautious about placing the Revolutionary Army anywhere on this ranking because they are such an unknown group. I don't feel they should be anywhere here, much along the same lines as no one should place Dragon anywhere on a power ranking.

Sorry for the wall of text, I'm pretty sure this still adheres to the question.