Reality seems to always turn out to be different than the somewhat juvenile fantasies of agenda driven, ethnicity obsessed amateur pop geneticists would have it.

See:
https://www.archaeology.org/news/916...alley-massacre

A massacre it was, but not a battle between a "northern" and a "southern" ethnic group. Looks more perhaps like the Native Americans raiding a huge trading caravan with women as well as men, animals and goods. They weren't even settlers, because there were no kinship ties.

"MECKLENBURG-WEST POMERANIA, GERMANY—According to a report in The Times, new genetic and chemical analyses of an estimated 145 sets of human remains unearthed in what had been thought to be a Bronze Age battlefield in northern Germany’s Tollense River Valley suggest that the dead were not members of a local army, but had come from many different regions. In addition, few of the individuals shared kinship ties. Wear and tear on the bones of the lower body also shows that some of the dead had been used to carrying heavy loads. “The picture that is emerging does not necessarily correspond to the picture of a warrior, but rather to the picture of people who spent their lives transporting things,” said Detlef Jantzen, chief archaeologist for the state of Mecklenburg-West Pomerania. The remains of women have also been found among the bones, in addition to gold rings, cylinders made of bronze, and glass beads from Egypt and Mesopotamia. Jantzen and his team think the site could be the remains of a large caravan of merchants who were attacked by raiders. “These are luxury goods we have found here and they have a very long journey behind them,” he explained. "