"A century ago, there would be a battle that wiped out the next village, you'd never even hear about it."
Huh? Maybe in the remote parts of Africa or some other place that was still stuck in the stone age. Maybe. In the parts of the worlds actually living in the (early) 20th century not so much.
I think there's some truth to this, in that not even that long ago when something awful happened far away it may have gotten printed in a larger newspaper but even then the details were spartan, often delayed by days or weeks (depending on how far back we're talking).
Do you honestly not grasp the difference between "next village" and "far away"? (Not to mention failing to grasp the standards of mass media that existed as early as the mid/late 19th century.)