Ft. Jasper was originally one of the numerous auto-targeting laser cannons used by the Eldridge before it crash landed on the Xenogears planet. Like Babel Tower, Mahanon, the Excalibur, Kadomony and the Zohar, Ft. Jasper as it came to be known was just one of a number of pieces of wreckage that was scattered across the planet as the Eldridge descended.