In Germany, to avoid suspicion, he enrolled in a university as a student. As a student in
comparative linguistics at the University of Saxe-
Anhalt in April 1914, Chattopadhyaya met Dr.
Abhinash Bhattacharya (alias Bhatta) and some other nationalist Indian students. The former was well known to the influential members as belonging to the
Kaiser's immediate circle. Early in September 1914, they formed a "German Friends of India" association, and were received by the brother of
Wilhelm II. The Indians and Germans signed a treaty in favor of German help to oust the British from India. With the help of Baron
Max von Oppenheim, who was an expert in Middle Eastern affairs in the German Foreign Office, Chattopadhyaya informed Indian students in thirty-one German universities about the association's future plans. He also helped in finding new members for the
Berlin Committee. Among its first members were Chattopadhyaya, Bhatta, Dr. Moreshwar Govindrao Prabhakar (Cologne), Dr Abdul Hafiz (Leipzig), C. Padmanabhan Pillai (Zürich), Dr.
Jnanendra Das Gupta (Zürich), Dhiren Sarkar, Narain S. Marathé, Vishnu Suktankar, Gopal Paranjapé, Karandikar, Shrish Chandra Sen, Satish Chandra Ray, Sambhashiva Rao, Dadachanji Kersasp, Mansur Ahmad, Siddiq. Other prominent revolutionaries who soon found their way to Berlin were
Har Dayal,
Tarak Nath Das,
Mohammad Barakatullah,
Bhupendranath Datta, A. Raman Pilla (A. R. Pillai), Chandrakanta Chakravarti,
M. P. T. Acharya,
Herambalal Gupta, Jodh Singh Mahajan, Jiten Lahiri,
Satyen Sen, and
Vishnu Ganesh Pingley On 22 September 1914, Sarkar and Marathé left for Washington, D.C., with a message for the German ambassador,
Johann Heinrich von Bernstorff. He ordered
Franz von Papen, his military attaché, to arrange for steamers, and purchase arms and ammunition, to be delivered on the eastern coast of India. On 20 November 1914, Chattopadhyaya sent Satyen Sen, V. G. Pingley, and Kartâr Singh to Calcutta with a report for Jatindranath Mukherjee or
Bagha Jatin. Bagha Jatin sent a note through Pingley and Kartar Singh to
Rash Behari Bose, asking him to expedite preparations for the proposed armed uprising. In 1915, Chattopadhyaya went to meet
Mahendra Pratap in Switzerland and tell him of the Kaiser's personal invitation to meet. He was dogged by the British agent, Donald Gullick, and an attempt was made to kill Chattopadhyaya. ==Revolutionary vagabond==