If Gregor needed to send a subtle diplomatic insult to the Cetagandan Empire, which he doesn't just now, I suppose we could return them with elaborate apologies.

This diplomatic insult almost led to war when Austria, Bavaria and other allies moved troops through Bavaria towards Hesse-Kassel in 1850.

It took some delicate negotiating to avoid a diplomatic insult.

"A diplomatic insult, perhaps?"

Which is both factually wrong and a diplomatic insult.

Provoked into war by diplomatic insult, Suleyman the Magnificent (1520-1566) attacked the Kingdom of Hungary and captured Belgrade in 1521.

In 948 or 949, the Sallarid ruler of Azerbaijan, al-Marzuban, became angry over a diplomatic insult sent to him by Mu'izz al-Dawla.

Viscount Hundro Moritani has responded to the diplomatic insult by carpet-bombing the Ecazi Palace and its surrounding peninsula!

The two republics were hurling diplomatic insults at each other, the texts of which Bonnie's paper printed in full.

Some time around 282 BC, a diplomatic insult formally "accepted as omen" was turned against Tarentum and helped justify its conquest.