The First Battle of Maar Sul took place in Maar Sul City in 1003 AE. The forces of the Grand Alliance sent a small group led by Kagetsu II to infiltrate the Yamatian-controlled city. The group's mission was to depose the treacherous Martin Struan in order to end the Struan Rebellion and open the gates so that the rest of the army could march into the city and take over. Maar Sul City was freed after a bloody battle, but the forces of the Alliance had little time to rest because they still had to retake many other cities in Maar Sul before the Yamatians could regroup and strike back.