A few decades ago, Dragonmarsh was indeed a weak country. Kimboku was ahead of Dragonmarsh in all areas of development.
However, they must admit that the two countries had completely switched places. If Dragonmarsh was allowed to develop freely, Kimboku would have to pay dearly in the future.
As such, Kimboku had been trying their best to thwart the development of Dragonmarsh. They couldn't afford to miss any chance at weakening Dragonmarsh.
This was also the reason why he came to the Sacre