white beard in his prime is still average yonko lvl, the WG isn't a bunch of scrubs if they were why hasn't the 4 yonko just annihilate them that moment. yea they all hate each other but my enemies enemies are my allies right? also white beard is a scrub compare to shanks. two armed shanks o jizzus..... dude stopped the war.
So, why doesn't one of the Yonko side with Marines and destroy other Yonkos. In that case it's still enemies of my enemies is my friends??
Whitebeard in his prime is strongest character in series (with Roger), so he can't be just average yonko level (whatever that means).
Marines can't stop 4 Yonkos at the same time. They could if it were just Marine HQ vs 4 Yonkos (without their crew), since it was said that these two forces balance each other. But 4 Yonkos with their crews are too much for not just marines but for World Goverment as well. So, WG by you is scrup, considering Marine HQ + Shichibukai can't take them.
Before Marineford war, it was said that WG (Marines + Shichibukai) can't deal with Beast Pirates and Red Hair Pirates who just made contact, while they are preparing for war with Whitebeard pirates.
So, World Goverment (Marine HQ (Sengoku, Garp, Akainu, Aokiji, Kisaru, Tsuru, BC Vice Admirals, other Vice Admirals, Pacifistas) + Shichibukai (Mihawk, Boa Hancock, Marshall D. Teach, Gecko Moriah, Donquixote Dolfamingo, Bartolomew Kuma)) is not strong enough to beat Beast Pirates (Kaido, 3 Disasters, and other members) + Red Hair (Shanks, Benn, Lucky Roo, Yasopp, and other members) + Whitebeard pirates (Whitebeard, 14 Commanders, 16000 members).
The guy stopped the war, after
- Marines got huge losts in the war.
- Bleackbeard pirates arrived with 5 new members from level 6, so in worst possible scenarion happes, Marines would need to fight Red Hair Pirates, Whitebeard Pirates, Blackbeard Pirates and Impel Down Prisoners.
- Some strong guys from WG's side already retreated like Mihawk.
If any Yonko character or Yonko level threath appeard war would stop, it doesn't matter would Kaido, Big Mom or Dragon be in Shanks' position, war would end there.