When was the first major labour union strike in the Digboi Refinery?

In 1939, there was a major labour union strike in the Refinery. The Gandhi Movement of Congress for Indian Independence struggle; backed by labour rights and equality status was headed by Sardar Amar Singh Marwah. The break of the World War II coincided with the Digboi labour strike resulted in harsh steps taken by the British Administrative offices to crush the strike. 

By: Jiyaur Rahman