Shift (Silo, #2)

by Hugh Howey

The great wars of old were like this. He remembered two wars in Iran, a new generation unremembering so that sons marched into the battles their fathers had already fought.

Scary, how close to our reality this is. With Russia in Ukraine with the help from North Korea and China. Like how the 2nd WW started just few decades after the 1st, how quickly people forget.