The anticipated battle between the Thunder God Pirate Crew and the G-5 Marine Branch never fully erupted.
Perhaps the World Government did not care much about the lives of Marines, but they had no choice but to seriously consider Vegapunk's advice.
Thus, despite their extreme reluctance, the Marines chose to abandon the G-5 Branch and humiliatingly handed it over to the Thunder God Pirate Crew.
After the war ended, intelligence revealed that, unlike past battles between pirates and the Marines—where pirates would return to their own territory afterward—this time, after the Marines abandoned G-5, the Thunder God Pirate Crew moved into the Marine G-5 Branch. Countless pirate ships from the Thunder God Pirate Crew's rear territories delivered vast quantities of supplies and provisions, turning the place into an impregnable fortress and one of the Thunder God Pirate Crew's new strongholds.
Only then did people realize why the Thunder God Pirate Crew had chosen to attack and occupy the G-5 Branch.
Their true goal was not to drive the Marines out of the New World, but to build a perfect logistical base for the future war between the Rainbow Country and the Marines.
As the saying went, before the troops moved, provisions came first!
The reason the Marines had established the G-5 Branch in these waters was its unique location. Through four routes into the New World, it allowed them to extend their reach across the entire New World. At the same time, the relatively safe waters ensured that the Marines at G1 could rapidly and safely reinforce the area, guaranteeing its security.
It could be said that G-5's location was unmatched throughout the entire New World.
And now, it belonged to the Rainbow Country's Thunder God Pirate Crew.
This meant that the Rainbow Country had linked the entire New World