Final answer:
The Battle of Bhangani in 1687 was the first fight between Guru Gobind Singh Ji and hill chiefs like Raja Bhim Chand of Bilaspur, which resulted in a victory for the Guru. The hill chiefs suffered a crushing defeat at the hands of the Guru.
Step-by-step explanation:
The first battle fought between Guru Gobind Singh Ji and the hill chiefs was the Battle of Bhangani, which took place in 1687. Guru Gobind Singh Ji led his forces against the hill chiefs, who were under the leadership of Raja Bhim Chand of Bilaspur. The battle ended in a victory for Guru Gobind Singh Ji, with the hill chiefs suffering a decisive defeat. This conflict underscored the tensions between the Sikhs, under their spiritual and military leader Guru Gobind Singh, and various local rulers, as well as the expanding Mughal Empire.