The Hashshashin, also known as the Assassins, were a secretive Islamic sect that emerged in the late 11th century. They were known for their strategic use of targeted killings against political and religious leaders, primarily during the time of the Seljuk Empire. Their stronghold was the fortress of Alamut in present-day Iran, where they trained their members in stealth and combat. The Hashshashin operated under the leadership of Hassan-i Sabbah, who founded the group. They gained notoriety for their daring missions and the psychological impact of their actions, which instilled fear in their enemies. Their legacy has influenced various cultural depictions of assassins throughout history.