This was observed in Greece, Thassos island, in June 2024.

The Crematogaster species is identified based on what I saw with my eyes, my phone camera and distribution. So take it with some scepticism. I don't like ID'ing based on subjective color descriptions and so I'm not sure if the Crematogaster are schmidti, ionia or something else. However if these are ionia (The species I'm leaning towards) it would be a new record for Thassos island according to (Scupola et Borowiec, 2023). The Camponotus seems to follow trails of the Crematogaster while evading them with swift manoeuvres.

**This "Additionnal information" part is not complete I will continue writing some more approx. 10 hours later.**

Ref:

Scupola, Antonio & Borowiec, Lech. (2023). Ants of Greek islands: where we are.