Before the war, there has been many border conflicts between both armies. Hermantine's usual response was to send a militia unit to convince any wandering soldier to return to Berlana is. But during one such instance, the 137th Infrantry Regiment of the Third Motor-Rifle Guards was ambushed, resulting in 30 dead and 10 wounded. This act forced Serene Queen Tallisabeth to declare war on Berlana is.