You picked on the weak first. Fourth Sea City was too tough, and after the Indigenous Kingdom's army had chipped its teeth on it, they ignored that hard bone and attacked the defenses of other families.
Their allies hadn't asked for help, and the Wrynn Family had no reason to rush to their aid.
The Servant Army was now locked in a war of attrition. The Five Great Kingdoms tacitly agreed to wear down the servant armies of the duchies that had submitted to them and disarm those duchies.
Servants should act like servants. They shouldn't keep private armies that wouldn't obey their masters.
The Five Great Kingdoms were dismantling the ruling classes of the duchies, turning their subjects into kingdom citizens who answered only to the kingdoms' call and swore allegiance to them.
Some duchies' ruling classes accepted the Five Great Kingdoms' dismantling of their privileges and eagerly integrated into the new kingdoms, seeking noble status.
Some duchies' ruling classes resented the oppression and rebelled after being persuaded by spies from other kingdoms.
Some of the rebel nobles defected to hostile kingdoms in the heat of battle. Others were wiped out by the kingdoms' forces before they could escape.
Whether they eagerly integrated or rebelled, the result was the same: the old duchy order was dismantled. Amid the Five Great Kingdoms' war, one Indigenous Duchy after another became history, its territory carved up and distributed among the new nobles.
The only one to survive was the Moro Duchy. The Loran City-State kept its promise and didn't dissolve it, allowing it to remain under the Loran City-State's suzerainty.
The Grand Duke of Moro was transformed into the Earl of Moro in the Loran City-State.
The Moro Duchy had no Seventh Rank Transcendent, so the Moro Family was only entitled to