1) M. Singaravelu (18 February 1860 11 February 1946), was born in Madras.
2) He was an early Buddhist, and like many other communist leaders, he was also associated with Indian National Congress initially. However, after sometime he chose a radical path.
3) Along with Thiru. V. Kalyanasundaram, he organised many trade unions in South India.
4) On 1 May 1923, he organised the first ever celebration of May Day in the country.
5) He was one of the main organisers of the strike in South Indian Railways (Golden Rock, Tiruchirappalli) in 1928 and was prosecuted for that.

1) The first major steel industry - Tata Iron and Steel Company (TISCO) - was set up by the Tatas in 1907 as a part of swadeshi effort in Sakchi, Bihar.
2) Prior to this, a group of Europeans had attempted in 1875 to found the Bengal iron Company.
3) Following this, the Bengal Iron and Steel Company was set up in 1889. However, TISCO made a huge headway than the other endeavourers in this sector.
4) Its production increased from 31,000 tons in 1912-13 to 1,81,000 tons in 1917-18.

1) Surya Sen's revolutionary group, the Indian Republican Army, was named after the Irish Republican Army.
2) They planned a rebellion to occupy Chittagong in a guerrilla-style operation. The Chittagong armouries were raided on the night of 18 April 1930.
3) Simultaneous attacks were launched on telegraph offices, the armoury and the police barracks to cut off all communication networks including the railways to isolate the region. It was aimed at challenging the colonial administration directly.
4) The revolutionaries hoisted the national flag and symbolically shouted slogans such as Bande Matram and Inquilab Zindabad.
5) The raids and the resistance continued for the next three years.