Lala Har Dayal (1884-1939) was an influential Indian revolutionary, scholar, and nationalist leader who played a prominent role in the Indian independence movement during the early 20th century. He is known for his radical views, anti-colonial activities, and contributions to the cause of Indian nationalism. Here is an overview of his life and contributions:

1. Early Life and Education: Lala Har Dayal was born on October 14, 1884, in Delhi, India. He received a comprehensive education, including studies in Sanskrit, philosophy, and law. He later pursued higher education in the United States.
2. Revolutionary Activities in the United States: Har Dayal went to the United States for further studies and became actively involved in revolutionary activities there. He founded the Ghadar Party in San Francisco in 1913, which aimed to incite an armed revolt against British colonial rule in India. The party published the “Ghadar” newspaper to promote its revolutionary ideas.
3. Anti-British Agitation: Har Dayal and the Ghadar Party played a significant role in organizing and mobilizing the Indian diaspora in the United States and Canada to support India’s struggle for independence. They sought to gather resources, disseminate anti-British literature, and plan for revolutionary actions.
4. Exile and Return: Har Dayal’s activities led to his arrest and subsequent exile from the United States. He spent several years in various countries, including Mexico, Switzerland, and Germany, continuing his anti-colonial efforts. He eventually returned to India in 1936.
5. Scholarly Contributions: Apart from his revolutionary activities, Lala Har Dayal was a prolific writer and scholar. He wrote extensively on various topics, including Indian history, philosophy, and social reform.
6. Death: Lala Har Dayal passed away on March 4, 1939, in Philadelphia, United States.
7. Legacy: Lala Har Dayal is remembered for his unwavering commitment to the cause of Indian independence and his efforts to mobilize the Indian diaspora in the United States and abroad. He remains a prominent figure in the history of Indian nationalism and revolutionary activism.

Lala Har Dayal’s revolutionary activities and writings left a lasting impact on the Indian independence movement. His work served as an inspiration for future generations of Indian nationalists and freedom fighters who were determined to free India from British colonial rule.