Bhima led the Pandavas attack. All other Pandavas warriors were following him, they tried to break the vyuha by a frontal attack but Drona frustrated them. The arrows of Drona began to melt away the Pandavas army. Yudhsithira was at his wits ends.
Arjuna was facing the only Samasaptaka who was surviving. Sursarma and his army went on fighting and kept Arjuna occupied. Young Abhimanyu, seeing Yudhisthira worried, said that he knew the technique of entering the Chakravyuha but did not know how to come out of it. Bhima said that if they could get the entry once, the rest should be left to him and his mace. Yet Yudhisthira was hesitant to sent the sixteen years old son of Arjuna, in absence of his father in such a deadly trap of death.
But Abhimanyu was very confident and so was Bhima. After taking permission and blessings of the elders, Abhimanyu went to break the vyuha with Bhima and others warriors following him closely.
Abhimanyu chariot went with lightening speed and before Jayadrattha could understand his move he was inside the vyuha. He was successful in breaking in to it. But an alert Jayadratha stopped Bhima and all other Pandavas from entering the vyuha. However hard they tried. While Kauravas had panicked by breaking into the Vyuha by Abhimanyu, now the Pandavas were desolate. Arjunaï¿½s son was inside the Vyuha all alone and they were kept outside.
Drona and all other warriors rushed to Abhimanyu to check his advance. Duryodhana, Dussasan, Salya and Karna were fighting him, all at once. Abhimanyu gave them a very tough fight. He could hurt even Karna. Single handedly, he kept all of them at bay. His valor even surpassed that of Arjuna. Kauravas were amazed to see his skill and prowess.
At the gate of the Vyuha, Bhima, Yudhisthira, Shikhandi, Drupad, Dhristadhymna, Virata, Nakula etc. were making determined effort to break into the vyuha but without any success. Jayadratha had obtained a boon from lord Shiva that enabled him to defy all the Pandavas when Arjuna and Krishna were not there. Now, Bhima was very sorry for his recklessness in encouraging Abhimanyu to go into the Vyuha.