Obama was 47 when he got elected.
Lexington and concord, april 1775
Right now, I would call them "diaspora" if they're more dispersed (Armenian diaspora is quite well-known) or a "community", for example "French community" if they're more closely in contact.
If they reject their new land's law and intend to include this land into their old one, they could be "colonizers".
I think it is the Athens
This may be wrong but i think it is right!!