Why is Europe so many different countries?

Reading Tim Marshall’s Prisoners of Geography over the Easter holidays developed my thinking and questioning as to why certain countries perpetually seemed to be at war. I always knew that France and Germany had historic disagreements, but never stopped to consider how the physical geography of the countries, combined with individuals’ desire for power, could influence this.
With this in mind, I created this two-lesson sequence, aiming to draw together elements of historical and geographical teaching in a way to help develop students’ schema of the medieval period, as well as to understand why countries perpetually seem to be at war. It is designed for Year 7, which is why I have combined some regions (notably France) into more of a nation state than it was.
As a non-geography expert, I am sure that there are many elements of the discipline that I could have included but did not. If you happen to think of any ways to improve this resource, please let me know.
The resources are here:
Victoria Bettney
University of York/Pathfinder TSA trainee 2017-18 and York High from September 2018