I'm confused on how the fish thing works, as in the previous chapter on one of the panels explaining their rules on food, "pork, alcohol, animals without cloven hooves," so yeah the veggies, fruit, and grain, work going off the previously stated rules but the stated "but also scaly fish" in this most recent chapter makes no sense at all. But whatever problem solved, it worked out, blah blah blah.
I find it nice that the prince can tell that most of the solutions rachel is supplying are in actuality marie's ideas because normally, male lead finds all the protag's amazingness out in one big reveal, but here, the prince is already suspecting and in some circumstances even knows that marie is the real hero during all these incidents. But this is still building up to a reveal cus marie herself doesn't know that the prince knows so when she is inevitably forced out in the open, or when he finally finds a way to give her credit and make his thoughts known, its much much more gratifying cus we knew that he already has had feelings for her, and he's also slowly realizing he has growing feelings for her.
The upcoming war will likely not happen but it depends on how long a story this will be. If its a long one, the war may happen and we get to see marie possibly become a strategist, or we get a closer look at her taking care of the commoners who have to deal with the effects of war, like we've been told has happened in the past when marie was on the run (remember that brown cloak? where she was handin out bread and what not, then again that could also be someone else and both the empire and the cloyan citizens think its the lost princess, but its most likely marie before she was a maid). However, if the story is going to be a bit shorter, we'll probably see marie come up with another solution, politically to both make the empire seem strong, and as well as avoid war.
And we haven't even touched the topic of the reveal of her being cloyan's lost princess. That reveal opens a lot of possibilities and routes for the story to go. An instance could pop up where marie has to be taken away because the empire is still dealing with the cloyan rebels, and while marie is losing her mind in fear, the prince has to figure out a way to convince marie to join him (as his bride hehe), to stop all the fighting. This route opens up the posibility of political battles to occur like with the west empire's emperor who also wants to marry the princess. Another instance, although a bit more unlikely, is that she successfully escapes the palace (because in her mind she thinks that if she's found she'll be immediately killed, which while true she hasnt thought of marrying the prince instead of death) and she either comes in contact with the west empire, or cloyan's rebels (because there is a small chance that the rebels are organized and are actually planning their battles) and the story shifts from there.
I could also talk about rachel's raise in status, and arial's fall and how the obstacle of the crown princess competition will be taken care of for our two (not yet) love birds to come together, but i think my wall of text is big enough so i'll leave it here xD