The Deltarian Border Marches was a Deltarian Duchy that existed from 2321 to 2352. In 2321, the First Jakanian Republic (United Jakania) was annexed by Deltaria to form the Border Marches. In 2352, a revolution occurred in the Border Marches, and the Border Marches became the short-lived Islamic Theocracy of Islamisbad, which less then a decade later became the present-day United Jakania.