What the Emperor needed to be worried more about would be the Southern Duchy. He knew they were eyeing his throne but he was sure of his capabilities to thwart their attempts.
Their ambitions were no secret. He knew they were watching him, waiting for the right moment to act. They regarded themselves as the lifeline of the Empire because of their industry and businesses...
Hah... Overconfident. They really overestimated themselves, hadn't they?
Yet, he was confident in his ability to outmanoeuvre them. His network of spies and loyalists ensured he remained several steps ahead, even against foes as cunning as the Southern Duke.
Especially with his most trusted advisor by his side. He knew that the Marquess valued the stability of the Empire more than anyone. Perhaps this was why he strengthened the military so much.