The second inter-dale war occurred in 1356 DR when Lord Lashan Aumersair of Scardale invaded a number of other dales. His forces quickly overcame Battledale, Featherdale and Harrowdale, and soon began invading Deepingdale and Mistledale.
However, Cormyr, Hillsfar, Sembia and Zhentil Keep were displeased by Lord Lashan Aumersair's intentions, and an alliance was formed, which saw his defeat and the collapse of his "empire". Among those who fought against Lashan was his brother, Lashar Aumersair, who would later become a co-founder of Harvest Town alongside his longtime friend, Faelar Lume, who fought alongside him against Lashan.