May These Leaden Battlegrounds Leave No Trace, Vol. 1 (light novel)

The power to rewrite history…and all it costs is a deal with the devil.

For a hundred years, the East and West have waged a ferocious war using everything from tanks to witchcraft, but the technological advancements of the West have begun to shift the balance. That all changes one day when Rain Lantz, a young soldier from the East, finds a few mysterious silver bullets—and discovers that anyone shot with them is erased not only from the battlefield, but from history itself.

So…