Crimean Tartars make really good sauce.
The Crimean Tatars made use of their strategic position between the Ottomans and the Russians. They supplied slaves for the Ottoman Janissary corps from the neighboring peoples; so many, in fact, that even the English word “slave” derives from the ethnic signifier “Slav.”
The Slav/slave connection has now fallen into disrepute, since the term is attested in Byzantine Greek, and probably comes from the Greek word for "spoils" (of war).