Non veni pacem mittere, sed gladium.
I remember reading in my Scottish history that during the centuries when, off and on, Denmark ruled Scotland, that along with the wars being fought against each other, there was also much intermarriage to cement treaties, et cetera, and thus, it was said of them, "They were forever putting rings on each other's fingers and knives at each other's throats."
Great old saying.
Try "The Last Kingdom"- Netflix. Enjoyable.
CW and I watched that series on Amazon - we enjoyed it too. I would recommend watching it...J