Who were the Spartacists?
A group of communists led by Luxemberg and Liebknecht.
They hates the new Weimer goverment so they treid everything to ruin it through protests and took over buildings in Berlin.
Since it was getting a lot the goverment had to ask the Freikorps (german ex-soliders who hates communism) to crush them.
This lead to Luxemberg and Liebknecht dead.
This is important because this lead to show us how weak the Weimer goverment is and how reliant they are on the Friekorps.
Since they are so reliant on them this later causes problems.