I did my read-up. I find there are a number of hypotheses regarding prehistoric conflicts in Europe, and the oldest are a good millennium before the first fishing villages on the Bodensee, so that was a wrong track.

The Linear Pottery Culture (c. 5600-4800 BC) was Europe's first agricultural (and thus neolithic) culture. (It radiated out from an area that is today Westernmost Romania, Easternmost Hungary and Northernmost Serbia.) The first war hypotheses of various strength circle around it. I mention a spectacular but almost certainly false one (which may be what I read about a decade ago), and the almost certain one.

At Herxheim in Southwestern Germany, there was an LPC settlement encircled by graves, which harbour the mangled bones of perhabs 1500 people, of which a third were dug up and assembled. In the LPC, settlements were not even village-sized. When discovered 12 years ago, the battlefield burial hypothesis was popular. But proper analysis of bones and stuff found with them points in another, though not any less spectacular interpretation: these bones were re-buried, and brought there from all across Europe, I mean from all across the LPC area. That is, we seem to have had the extreme luck to discover the Vatican of 7000 BC.

On the other hand, from the end of the Linear Pottery Culture, there are a number of mass graves filled with dozens of violently killed people of all ages, probably whole settlements butchered. There are various theories about what was and what caused the underlying conflict, and how widespread it could have been across Europe.

*Traitor*, n.
A benighted individual who perceives an illusory distinction between serving his nation and abetting the criminals who govern it.