Hiyas guys! i asked a question about how to make a galaxy a few days ago (thanks for the replies!)

So here it is, what im going to use my galaxy for is a giant map for a space empire which is called...

The Terran Federation of Planets!

ill be writing up a large backstory for the Federation and the galaxy, but i would like some input on what i should do with this, but i will be using this Federation as more of a dictatorship then a democratic one as the title suggest hehe

What do you think should be thrown into the mix?