In 1944 Basu became involved in trade union activities when CPI delegated him to work amongst the railway labourers .
In that year , Bengal Assam Railroad Workers ' Union was formed and Basu became its first secretary .
In 1944 Basu became involved in trade union activities when CPI delegated Basu to work amongst the railway labourers .
In that year , Bengal Assam Railroad Workers ' Union was formed and Basu became its first secretary .