Whom does Rikki Tikki fight in the ''great war''?

Rikki-tikki-tavi, a short story written by Rudyard Kipling tells the story of the mongoose Rikki-tikki and his battles to protect his adopted family. His "great war" is fought with the two King cobras, Nag and Nagaina. It ends with Rikki-tikki killing both snakes and destroying their clutch of eggs.