[lukan]

"interesting new phenomenon"

I would argue, directly targeting the leaders of another state is a "interesting new phenomenon".

[gmuslera]

Sleepwalking into a dystopia that would had made Aldous Huxley and George Orwell to blush falls into the interesting arena.

[Shank]

This has happened for thousands of years.

[lukan]

Yes, but I am currently not aware of any pre WW2 events.

[JorgeGT]

The Ryan Doctrine.