The breakthrough of the Southern defense line means the complete failure of Frandy and the other Three Great Dukedoms' deployment in the south, with more than half of the country's territory falling under the iron hoof of the Blue Dragon Kingdom.
This is the most fertile river plain area among the three countries bordered by the Border Great Wall, and more than half of the national income comes from the south.
Moreover, those river plain areas are where the population of the Duchy is concentrated, and where the upper nobility's oppression of the peasants is most severe.
During this period, among the refugees fleeing south from the Frandy and the Three Great Dukedoms, the number from this southern region is the highest.
You could say,
With the southern defense lines of the Three Kingdoms torn apart, half the Three Great Dukedoms are declared extinct and the entire nation is on the verge of collapse!
Not only that,
