Genetics and the Crusaders

The next great non-written resource for studying the history of humanity is genetics. When the Crusades went through Lebanon the men of the Christian armies left unmistakable evidence of their passing and settlement. The fascinating thing is that it was primarily among the Christian population of Lebanon that these genetic markers appear. The Muslim population shows equally clear evidence of Arab expansion.

There is obviously a story there that involves a bit more than arms, combat, bigotry and atrocities.