@Ryuksgelus:
Did you miss the entire scene with Marco proclaiming they won't let anybody who hurts one of their friends stay alive? They aren't going to just pick up and leave once they've freed Ace. It will only be time to avenge all those who fell while saving Ace with Ace alongside them. The Government also wouldn't let the strongest man in the world just leave when he's literally on their doorstep. Wars just don't end that abruptly, Garp reinforced that point in ID. Fighting won't end till one or both sides are decimated.
Granted.
If the Marines, at the end of this war, have full force then I would believe they will make an attempt at WB's life but if they lose admirals and shichibukai do you think they are still going to try to take down WB? I would think they would make there best "attempt" to retreat to avoid even more casualties.
If WB, at the end of this war, has enough forces to take down the remaining Marine forces, then I believe that he will attempt to do so.
This is all based on casualties of the war.
Also keep in mind that the WHOLE WG is NOT at this War, just very high officials and key players, even if they were all destroyed, it would not necessarily mean the complete end of the WG or Marines, just a BIG BIG BIG setback that, if they don't have any type of backup or recovery, could quickly result in its complete demise.
What I am trying to say and warn is not to underestimate the WG or the Marines, especially since WB already identified Sengoku as a great strategist, it would be foolish to believe that the WG went "all-in" for this execution, they must have a backup plan (MAYBE replacements) or something because, like I mentioned before, they would be foolish and ignorant not to have a plan for the different outcomes of this war whether that be:
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WB saving Ace and commencing a full fledged attack which causes the loss of some or all admirals, shichibukai, marine forces.
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WB losing, Ace being executed.
And many more different type of outcomes foundational to whats mentioned above but with different variables (i.e. Ace being saved, WB still dying.)
If you were in the WG position, wouldn't you try your best to consider every possible outcome and plan to each of them accordingly? Isn't that how most Governments in the world work today, especially when it comes to a war?
Now I could possibly be seriously overestimating the WG and giving them too much credit but for some reason, I do not see the complete downfall of the WG at this time.