The main reason Tsugikuni Yoriichi had left the Boin Archipelago and returned to Marine Headquarters was that the Marines planned to deploy eighty percent of their total forces to wipe out the Roger Pirates.
According to intelligence received by the World Government and the Marines, Roger had already gathered all four Red Poneglyphs and was now preparing to head for the Final Island.
Upon learning this news, the World Government could no longer sit still. The highest ranks of the World Government apparently knew what was buried on the Final Island and did not want anyone setting foot there. They therefore urgently ordered the Marines to encircle Roger, hoping to stop the Roger Pirates' plans.
It was precisely because this was an order from the World Government that Fleet Admiral Kong had mobilized elites from all Four Blues, summoned all Marine Headquarters officers and soldiers, and gathered them in Marineford for a war council.
Both Garp and Zephyr sensed that this would be an unprecedented battle, so they brought Tsugikuni Yoriichi back from the Boin Archipelago. By now, Tsugikuni Yoriichi had also grown into a formidable fighting force. Of course, Zephyr had not called Yoriichi back so he could earn any military merits on the battlefield.
He simply wanted Yoriichi to observe this war up close and personally experience the strength of the sea's top powerhouses. Broadening his horizons would benefit Tsugikuni Yoriichi.
The war council held in Headquarters' assembly hall lasted the entire morning. Of course, calling it a meeting was generous—it was really just a one-sided issuing of orders.
The battle plan had actually been drafted long ago by Sengoku and Tsuru. The meeting merely assigned the various parts of the plan to the officers responsible for carrying them out.
This war council had nothing to do with