Marcus Licinius Crassus, the eldest of the three, was not only the richest man in the Roman Empire, but one of the wealthiest people to have ever existed. He owned silver mines.
Crassus himself was killed after negotiations for a truce apparently turned violent. His death put an end to the First Triumvirate, which resulted in a civil war between Julius Caesar and Pompey.
Alarmed that slaves could defeat the Praetorians, the Senate dispatched Marcus Licinius Crassus, who raised a sizable force of eight legions (about 40,000 troops).
There was little Spartacus's slave army could do because they were trapped between two Roman forces as Crassus had split his command.