The Jugantar (Yugantar) group was a prominent revolutionary organization based in Bengal. While initially associated with figures like Barindra Kumar Ghose, during the later phase, particularly around World War I and the plans for armed insurrection (like the Indo-German conspiracy, also known as the Ghadr-Jugantar Conspiracy), Jatindranath Mukherjee, known as Bagha Jatin, emerged as the key leader and driving force of the Jugantar group.