So I'm going to open a "0th" post that we can both access to keep our notes in one place. I'll add what we did in the posting back and forth and some ideas for the country. I'll leave it to you as to what sorts of misinformation you'd like to use/make up for your folk. Seems like their vision of the other country would be mostly dependent on their own cultural perspectives. :) 

I'm going to leave things fairly open ended at this time. Feel free to make assumptions and I'll add/take away as needed. I don't mind your having a hand in making bits of the country in game. In particular if they are in the desert to start. It'd be silly for me to be the only one with the information. 

It also does not seem to alert if we put something in the 0th post. It only alerts that there's something new if you put in another post, like this one.