This plane was originally conceived about 50 years prior to the beginning of the machine war as a replacement to the B-52. Entering service in 2053, it began its service as the B-417. In 2118, with the creation of the machine nation 01, hoverpad technology began circulating and soon found its way to the B-417, Replacing it’s jet engines. The upgraded aircraft was given better aerodynamic properties and designated B-431. The plane was later used to drop nuclear bombs on 01, as well as be the one to drop nano bombs during operation Dark Storm. It served throughout the machine war dropping nuclear ordinance until the defeat of the humans over 100 years later.