Now let's sum up average Sith activity on most planets:
Strong leader acting as the harbinger of Emperor's will / ambitious Sith;
All the means necessary to win the war;
Constant communication with the Council / Darth that oversees the whole campaign;
Republic pretending it's not supporting the rebels or the force it deployed, ready to be crushed.
Long story short:
Republic - "oh my God, the Empire/bad guys are tearing us apart, sir, please, help us! We can't do it on our own!"
Empire - "My lord, we have located the Republic / Rebel / Resistance / Pirate / Mercenary base and we're ready to slaughter them. Will you do the honors and spearhead the whole operation?"
I don't think that's true at all:
Both sides stories are presented as you have to save the day.