^There's the scene in the movie where Palpatine says "The Republic will be reorganized into the first galactic Empire."
Also in ROTS we don't see the bridge interior of the Venator-class until the end of the film, so presumabely the green suits were there earlier. I'm sure the officer corps was also expanded eventually, to fill the command void left by the Jedi's demise.
There's also a deleted scene where Palpatine says he will be installing regional governors (Moffs) Tarkin is a Moff.
Also the Imperial officer design is a bit different I think than the one in the OT.
Also in ROTS we don't see the bridge interior of the Venator-class until the end of the film, so presumabely the green suits were there earlier. I'm sure the officer corps was also expanded eventually, to fill the command void left by the Jedi's demise.
There's also a deleted scene where Palpatine says he will be installing regional governors (Moffs) Tarkin is a Moff.
Also the Imperial officer design is a bit different I think than the one in the OT.