The Freedom War, also known as the Northern Rebellion, was a war of independence fought from 4648 AR to 4655 AR between the newly liberated nation of Molthune and the rebel forces under the command of the half-elven trapper Irgal Nirmath. It ended in victory for the rebels, who subsequently formed the nation of Nirmathas.
The death of Aroden brought political instability to countless nations throughout Golarion. Caught up in a civil war, the Chelaxian Empire was unable to hold on to its outlying provinces, which splintered off to form their own governments after centuries of centralized control. One of the first of these was the nation of Molthune, which seceded in 4632 AR and claimed all lands between the Nosam River and the southern border of Lastwall as their own. The peace did not last long, however, as the independent peoples of the southern Fangwood (from the Marideth to the Tourondel Rivers) began to grow resentful of what they saw as meddling by the capital city of Canorate. This unhappiness fueled acts of sabotage against the southern government and eventually grew into a full-fledged guerrilla war in 4648 AR.
The northern rebels were largely disorganized woodsmen, who suffered harsh defeats at the hands of the better-trained Molthuni forces. This started changing when a half-elven trapper named Irgal Nirmath emerged as the rebel's leader. He united the disparate groups and began to inflict losses against the southern armies. As his victories mounted and the legend of Nirmath spread, the rebel army renamed themselves Irgal's Axe. The conflict came to a close under a shaky peace signed in 4655 AR. Before the northern forces could declare their independence, however, Irgal Nirmath was slain by an assassin. In honor of their fallen leader, the people decided to name their new nation Nirmathas.