The Summer Heroes
Year of Conflagration
Year of Congflagration
1893 YS / 837 BR is known as the Year of Conflagration. This is the year Soren was sacked by orcs and several provincial capitals of the Sorian Empire rebelled against Imperial rule. After the Year of Conflagration the Empire retreated from Penwith and eastern Orem.
For additional detail, see The Empire Aflame.