The two dukes' anger came as no surprise to Rob.
He knew these nobles of the Nolant Kingdom all too well. As the first generation of nobles from the kingdom's founding, they were brave and fearless, but also immensely proud and conceited.
For nobles, that was hardly a problem. In fact, if you lacked a certain arrogance, people would look down on you.
Just then, a message from Ian arrived, detailing the routes and plans for the two dukes' upcoming advance.
If Ian's mother had not been on Reef Island as a hostage, Rob might have hesitated. As things stood, he immediately began the next stage of planning and deployment after receiving the information.
"Activate the Iron Nut Wall Plan. Build it at these locations..."
"Mobilize the First Combat Magic Plant Brigade. Have them undertake their first battle under the Tree Shepherds' leadership."
"Arrange an emergency evacuation for the Northern Frontier residents behind the nut wall."
"Since they're sending their peasant soldiers to attack, kill them all."
Orders streamed out of Rob's command center, and the Northern Frontier's vigorous new power structure immediately sprang into action.
Like precision gears spinning at high speed, it began to turn.
At his command, the apprentices immediately got to work.
They had more than enough ways to deal with soldiers who were, essentially, only slightly stronger than ordinary people.
After a brief flurry of activity, a spectacular tide of magic plants appeared on Kroya Plain-
Guided by little trees carrying recorders, the first to take root were towering, enormous nuts with a metallic sheen.
After landing and taking root, they began to fuse together, completely blocking every branching road except the main route and forming an iron wall a full ten meters high.
Like the legendary Wall of Sighs, it stretched across the land.