And by others too.
>so they were free to unite
Were they free not to unite?
>Sort of like the original United States of America if you wish.
Well, USoA genocided Native Americans, even now their life expectancy is 15 years less than in the whole US.
>GREATEST EMPIRE OF ALL TIME
That will be Mongolian empire.
I'm gonna ignore your whataboutism. The American states were colonies of the British Empire. They thought, became free, then united. End of story.
Yeah, I sort of forgot about the Mongolian empire because I ignore it most of the time. Nevertheless Wikipedia estimates its peak size at 23,500,000 km² while USSR had 22,402,200 km², so they're pretty close.
It's just that your analogy goes further than you thought.
>WW1 liberated them
And what happened to other ethnicities living on the lands of Greater Romania? As I already said, Romanian fascists genocided Jews on the lands that you say belong to Romania.