The Galactic Empire was the powerful dictatorship that saw Darth Sidious, aka Emperor Palpatine, ruling over the galaxy. Instead of having to take the galaxy by force (no pun intended), Palpatine ...

Darth Sidious lurks in the background ... Emperor Palpatine and the Empire committed a fair amount of resources to rounding up the remaining Jedi in an attempt to either turn them to the dark ...

The apprentice who kills Plagueis that story is referring to is meant to be Palpatine, Darth Sidious. But before Sidious, the idea appears to be that during his artificially extended life ...