Rostland was first inhabited by Taldan explorers in the latter half of the Age of Enthronement under the leadership of Baron Sirian First, a hotheaded, impulsive noble forced to emigrate from Taldor after losing one too many duels. When the fledgling colony suffered a number of brutal attacks from bandit lords to the south, First accepted the challenge of the ruling bandit lord to duel for the future of the burgeoning settlement. Unable to best the bandit king, First paid his wager and disappeared, most assuming he was gone for good, too embarrassed to show his face after the defeat. Several years later, First returned a changed man.
Answering to the name Sirian Aldori, the "Sword Baron" challenged to bandit lord to a rematch and defeated him handily in seconds. He followed this with a standing offer of 100,000gp as a reward for any who could best him in a battle of blades. None could defeat him, whether through legitimate means or trickery and magic. At first, Aldori refused to teach any of his techniques, but he eventually capitulated and began to train a select group of swordsmen under the condition that they each swore to change their name to Aldori and never teach their techniques to any outside the swordpact. These swordsmen became known as the Aldori swordlords. They ruled Rostland for generations, each as prickly and impulsive as the order's founder.