Mahou Shoujo Tart Magica - The Legend Of "jeanne D'arc"

From Yen Press:
Joan of Arc is revered as a hero of the Hundred Years' War and a saint of the Catholic Church. But her leadership and strength of character in her time did not escape the notice of Kyubey, who, even in the fifteenth-century, sought Magical Girl candidates for their valuable energies. With her friends and fellow Magical Girls fighting at her side, Joan fights the English occupiers of France--but will she soon find herself fighting something much more sinister?!