In the great battle at Kurukshetra, Bhishma was the supreme commander of the Kaurava forces for ten days. He fought reluctantly on the side of the Kauravas. Bhishma was one of the most powerful warriors of his time and in history. He acquired his prowess and invincibility from being the son of the sacred Ganga and by being a student of renowned Gurus. Despite being about five generations old, Bhishma was too powerful to be defeated by any warrior alive at that time. Every day, he slew at least 10,000 soldiers and about a 1,000 rathas. He loved all his grand-nephews and wanted a peace negotiation.