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".
Well, I'm not sure which war you're referencing. But, if it's WWI, they did it through war bonds and taxes. Mostly war bonds.
Answer:
Donato Bramante
Explanation:
The so-called Tempietto (Italian: 'small temple') is a small commemorative tomb (martyrium) built by Donato Bramante, possibly as early as 1502, in the courtyard of San Pietro in Montorio.
That that cause was the greatest cause ever/