Sengoku knows some of the void century but not all of it in the New World the main sources of info will be the Gourosei once sengoku tells us all he needs to we go back to the gourosei who blew up Ohara after the outstanding facts Dr. Clover delivered (I'd blow em up too it sounds like they tryin to get us hated) but many marines are starting to see the truth, corruption, hate, wickedness, and evil in the true marines
They sent CP9 a SECRET organization that no one knows about that have a LICENSE to kill (btw oda is smart he talks about real government and current affairs :P)
The government hides info. Smoker defeated Croc and saved Arabasta you say?
NO! they don't want to give GOOD pirates the recommendation they deserve but make marines look like it was all because of them. Instead the pirates get even more feared after their captain's bounty is raised.
Marines don't take chances even if it means hurting the innocent to save them from being discovered and their true motives of reviving the ancient weaponS not one weapon more than one in which their combined power can destroy the world. Why not just burn the plans you say? It must be necessary not only to evil but for good. the ancient weapons must have a good intent to them as well as evil.
They use people then kill them re-jail them this is seen with Shiryuu as to y he has joined the BB pirates.
They kill their own forces. They have Giants, poison men, and zombie reviving operatives that reckelessl,y hurt unecessary or useless forces.
The marines attack even after their objective has been completed and use technicalities to obtain their goals w/o "endangering" innocent civilians' lives. Such as enies lobby with the SH technicality and Marine HQ where they lose lives on a war in which their objective to end the PK's bloodline has been finished.
There must be another base too cuz if you have not noticed. Enies Lobby- Destroyed
Impel Down- No prisoners
Marine HQ- Destroyed
All of the three bases of operation have been destroyed so what is left?
The answer must be in the new world with a secret training camp for new marines as the pirates in the NW are unbelievably strong and marines must use other pirates to fight against eeach other whether intentional or planned such as shicibukai and deceiving messages or what not. Plus the gourosei are still alive so where are they hidden must be gourosei summit if that's aplace or just that podcast thing (i know ppl base titles off of real titles so..) there must be a base of operations there. There are a few marines who have noticed the coruption and the pawns might follow
(giant Saulo or w.e)
Maybe even Garp cuz he's pissed off
We know Commodore Drake saw the way since he is now a pirate