July 20, 917, Empire of Prosen, Eagle's Nest.
"Last year we focused on homeland defense and designed an armored train." The experts from the Imperial Ordnance Bureau introduced to the Emperor, "The characteristic of this train is that it has armor on only one side, allowing the armor to be very thick. To balance the weight, we have set up all the weapons and mechanical devices on the other side of the train."
Emperor: "The cross-section of this thing looks so ugly!"
Expert: "But it's indestructible! The connected carriages form a ready-made defensive line when parked on the railway. We have already assembled three armored trains, stationed on the inevitable path of Rocossov! They are bound to play a huge role!"
Emperor: "What if Ante's infantry approaches at night and plants explosives under the train?"
"We have the latest night vision spotlights!"