How did Rome unite its empire?

Guys....I'm sorry but you don't make any sense. Does anyone have a STRAIGHT answer?

Thanks for the websites but they really did not tell me much about the answer i am looking for have anything else :D

Ok, so which paragraph are you saying because it is alot.

This makesno sence

what did you say genjustu

something in a different language

Realllllłlllllłłłlllllllÿyyyyyyyyyyyyyyyyyy

Glee club lover
The whole freak

There was no kind of sense in doing that at all, GLEE CLUB LOVER. freak.

Ok, i read it. So i am think that Rome united its empire by expansion. Tell me if i am on the right track.

That's how they gained territory, but how did the powers in Rome keep control over all of them, especially as the empire got larger and larger?