The final Mishna of the 6th chapter of the Bava Batra tractate deals with the construction of burial graves in Judea and the Galilee, which is where the Mishna was created. The following Gemarah is somewhat unreal, since so far as I know there weren't any comparable burial graves where it was created, in Babylon, which is today's Iraq - a flat and muddy place, with no rocky hills into which to dig burial caves. Yet these pre-Iraqi rabbis deliberated the elaborate details of the caves as if they were a part of their everyday experience. In a way, they were: Erez Yisrael always appears in Jewish literature with an immediacy not accorded to the actual environment of the scholars.
The whole section is rather morbid, yet a page or so into it it take on some even darker hues, when the rabbis discuss what happens when an orderly burial cave is found to have a disorderly pile of hastily buried bodies in its anteroom. The rabbis deliberate this matter for a page or so, and then move on to other matters.... But wait, what is it they're talking about? Why would a society with a clear burial tradition suddenly deviate from it into chaotic behavior? Unless, perhaps, the chaos is far more extensive than mere burial customs? Perhaps these dry discussions are skirting around an historical period of widespread violence, mass death, and hurried burials of mounds of corpses in old cemeteries?
Such as the Judean wars against the Romans, at the time of the Great Revolt in the 1st Century, and even more so the Bar Kochva revolt of 135 when the Romans committed an effective genocide of the Jews in Judea, killing perhaps 900,000 of them. Events of that magnitude can't be swept out of the communal consciousness, and tend to pop up in all sorts of unexpected spots.
And there they remain for as long as the communal memory keeps going. In the case of the Jews, almost two millenia and going strong.
Bava Babtra tractate, pages 101-102.
As always, I note for the benefit of readers who don't understand what I'm talking about, that this thread began here.