Stephen Quadros used to write a monthly article in Black Belt Magazine. A few of the articles highlighted the IVC (International Vale Tudo Championship).
That's where I first learned about Wanderlei Silva, Milton Bahia, Carlos Barreto, and of course Jose "Pele" Landi-Jons.
The UFC in the States was going through a sort of "dark age" as athletic commissions were calling NHB a "blood sport".
Until Sao Paulo made it illegal, in the IVC, the best of the best fought NHB, from the States, Canada, Japan, Russia, and Brazil.
Gary Goodridge once used a Tactical Testicle Trap on The Pedro (Otavio), crushing Otavio's nut sack.
Head butts, groin attacks, kicks, knees n stomps to a downed opponent were perfectly legal.
Fight Pass has these legendary events on tap.