What surprised me was the number of battles fought in Europe. It appeared to be the most violent place on the map. Is this because of a bias in the collection of the data, or is this representative of Human history?
This data set appears to not be a particularly well-curated dataset, and it looks to my (non-expert) eyes to have an intrinsically high bias towards high detail of some key Western European conflicts even beyond the general bias imparted by the fact that histories of Europe tend to be the most well-curated and accessible if you're an English speaker.
There's a massive bias in our historical records towards Europe. But Europe has also seen a lot of wars.
Perhaps more of European history was recorded/found?