Not Persia and Greece.
Persia was/is Fars/Pars - one of the provinces of the Iranian Empire. They always called themselves the Iranian Empire - consisting of various Irani peoples like the Persians, the Medes, the Kurds, the Baluchis, the Tajikis (Sogdians), Bactrians, the Parthians. You had other Irani peoples like the Sarmatians, the Alans (ancestors of modern day Ossetians ) etc.
This was technically the Sassanid Iranian Empire - the empire of the “truth” “Aryan” - Iran is derived from the same root as Aryan/Iron/Alan
There were no “Greeks” by the 7th century. They called themselves Romans. This was not the “Byzantine Empire” - a term coined by later Rennaissance writers to create the other, but this was the ROMAN Empire with the Basileus, emperor of Rome.
This was acknowledged by the Ottomans who called their conquered lands as the Sultanate of RUM (Rome).
the greek speaking, orthodox called themselves Romaoi - Romans right until the 1800s when Shelley and other romantics tried to connect them to the hoary past of Socrates rather than to Christian Constantinople
OMG, you are really, really smart!
I realize you understood that I was talking about the Byrzantine/Sasanian War, but I wanted to make a point even the less intelligent people would understand. Smart people like us have to talk down to the less intelligent, as you are well aware.
And DO NOT even get me started on Persia just being a province whose name was generalized! How can the dumb people be expected to know THAT?