During the Great War of Polaris, the warbot Zephyr was stationed in the Zenith Outpost in Meridian City. Later, during the perilous Phylax intrusion, he was joined by another warbot named Cronk, who later became his lifetime partner. The two were later sent on a mission to secure a Gelatonium Refinery on the planet to be able to transport fuel to the Meridian Armory.