Perhaps, starting from the morning court session after dawn, it would be a time of relentless slaughter.
But even if it meant cutting to the bone to cure the poison, the nation's own deficit would surely be immense. Victory in foreign wars was the best way to divert domestic contradictions.
Consider Yan State's territory, national strength, and population. Add to this the time needed to shift internal conflicts, and even factor in the ages of the Yan Emperor and the Earl of North Border. Yan State truly did not have much time; they could not afford to delay.
Conversely, Qian State also lacked time. If Yan State couldn't crush it in one fell swoop, giving Qian State a chance to catch its breath, reform, and change, it would be a disaster for Yan State.