[quote=@Assallya]
In the Revenge of the Sith, the Separatist Fleet manages to bypass the entire Republic Fleet and kidnap Senator Palpatine before anyone has a chance to react because the Separatists discovered records of a lost Hyperspace route that served as a back door into the Coruscant System.

[/quote]

The mission the Endeavor partook just before being warped into this universe was based on that whole hyperspace route btw, although I added that the CIS used a portal to get over to that hyperspace route. (that was only one portal out of several but yeah)