It's present day Iraq... and Persia is Iran...
iraq
Iraq
Iraq
Iran
There is no country that separates Iraq and Iran.
It is neither a country nor a state. It is a name of an ancient region where you now find Iraq, Kuwait and parts of Syria, Iran and Turkey.
The country of Iran is larger.
Iran. Do NOT confuse with IRAQ , which is an adjacent nation, with a common border with IRAN.
Iraq
There is no such country. Iran and Iraq share a border along the Zagros Mountains.
Iraq is further west than Iran