Before the Mahabharata war began, Lord Krishna asked all the Pandavas how many days they would take to finish Mahabharata war alone. Bhishma answered that he would take 20 days to finish the war. Dronacharya replied that it would take him 25 days. When Karna was asked, he said he would take 24 days. Arjuna told Krishna it would take 28 days for him to complete the battle by himself. In this manner, Lord Krishna asked each warrior and received an answer. Krishna disguised as a Brahmin, stopped Barbarika to examine his strength. When asked how many days he would take to finish the war alone, Barbarika answered that he could finish it in one minute. Krishna then asked Barbarika how he’d finish the great battle with just three arrows. Barbarika replied that a single arrow was enough to destroy all his opponents in the war, and it would then return to his quiver. He stated that, the first arrow is used to mark all the things that he wants to destroy. If he uses the second arrow, then the second arrow will mark all the things that he wants to save. On using the third arrow, it will destroy all the things that are not marked and then return to his quiver. In other words, with one arrow he can fix all his targets and with the other he can destroy them.