Midnight.
Silver City's air force base was bustling. Under command, airships continuously rose into the sky, reaching their assigned altitudes and forming an expeditionary formation beneath the heavens.
The soldiers in the base looked up from the ground. The signal lights of the airships formed a massive arrow in the sky. This reduced wind resistance and minimized the energy consumption of the entire force.
The former tenth Black Knight, now the new Duke of Silver, stood before the floor-to-ceiling glass of the control tower. Behind him stood nine newly promoted Black Knights.
These Black Knights were all disciples of the previous Duke of Silver, Old Two, Old Five, Old Liu, and others. Their strengths varied greatly; some were C-Class, while others were A-Class.
Now, this legacy had been preserved and had completely become a chess piece in the royal family's hands.
Once everything was ready, the Duke of Silver turned to the Black Knights behind him. "The time for revenge has come. It is time to make the Eastern Continent pay a painful price. We will reach Relay Island in one day, rendezvous with Storm City's fleet, land in the north of the Eastern Continent Federation, gather the northern forces of Kashima and Jindai within a month, and take the Federation within three months."
After half a year of construction, Relay Island was finally ready for use, opening the way for the Empire to wage an unprecedented war.
At the same time, Storm City's forces were also assembling at top speed. An airship slowly arrived in the night sky and landed atop the Storm Aerial Fortress.
The Duke of Storm was the first to descend the gangway and enter the Storm.
In the darkness, someone silently watched it all from a corner with the edge of his eye. Once he