On the 13th day, Drona arrayed his troops in the Chakra formation, a very complex and almost impenetrable formation. His target remained the same, that is, to capture Yudhishthira. Among the Pandavas, only Arjuna and Krishna knew how to penetrate this formation, and to prevent them from doing so, the Samsaptakas led by Susharma again challenged Arjuna and kept him busy at a remote part of the battlefield the whole day. Arjuna killed thousands of Samsaptakasa, however, he couldn't exterminate all of them.
