Biah Pish is a region in Gilan Province of Iran.
[1] Before the Safavid dynasty this region was under control of the central government of Iran.
During the Safavid dynasty, because of Kia'is help to Ismail I, the region gained more autonomy and Khan Ahmad Khan was the most famous governor of Biah Pish.
After Shah Ismail's death, his successor freed Khan Ahmad.
In 1591, Khan Ahmad tried to get help from the Russian Empire to overcome the Safavids, but the central government recognized this and finally Abbas I of Persia conquered Gilan.