This is a historical question about the origins of the trade union movement in India.
The Madras Labour Union is widely regarded as the first systematically organized trade union in India.
It was founded in 1918 by B.
P.
Wadia, a close associate of the social reformer Annie Besant, primarily for the workers of the Buckingham and Carnatic Mills in Madras (now Chennai).
While there were earlier associations and strikes, the Madras Labour Union is considered the first to have a formal structure, regular membership, and a clear charter of demands, marking the beginning of the modern trade union movement in the country.