The leader described in the question is Bal Gangadhar Tilak. He was part of the trio known as Lal-Bal-Pal (Lala Lajpat Rai, Bal Gangadhar Tilak, and Bipin Chandra Pal), who were prominent leaders in the Indian National Movement around 1905. The trio was instrumental in advocating for more aggressive resistance against British rule. Tilak, who belonged to Maharashtra, was particularly known for his slogan "Swaraj is my birthright," emphasizing self-rule for India.