First ever gada yuddha between Bhima and Duryodhana took place during the test that was conducted at the end of the training of Pandavas and Kauravas. Bhima and Duryodhana collided with each other like two huge elephants. The spectators divided among themselves and started cheering Bhima and Duryodhana.
The crowd was in rage and uncontrollable. Dronacharya found this kind of division among the people dangerous and stopped the fight in between.