Who was the leader of the Indian revolutionary activities in America?

Lala Hardayal was the founder and leader of the Ghadar Party, established in 1913 in San Francisco, USA. The party aimed to organize Indian revolutionaries abroad (particularly Punjabi immigrants in North America) to overthrow British colonial rule in India. Hardayal, a scholar and intellectual, mobilized the Indian diaspora and published revolutionary literature. The party's activities culminated in the Ghadar Conspiracy during World War I (1915), which attempted to incite a mutiny in the Indian Army.