Should Greece really be on that list? The only criterion where it’s not grayed out is “Awarded Parts of China to Japan”, which actually means “signed the Treaty of Versailles after WWI”. And unlike many of the other countries that signed it, Greece did not get anything to itself from it.
It’s less a geographical or hemispheric distinction, and more a political one.
This page on imperial core is good.
Should Greece really be on that list? The only criterion where it’s not grayed out is “Awarded Parts of China to Japan”, which actually means “signed the Treaty of Versailles after WWI”. And unlike many of the other countries that signed it, Greece did not get anything to itself from it.