In September 1914 Kamagata Maru ship had to return without unloading its human cargo after its passenger suffered indescribable tortures at the hand of the imperialist whites. So Kartar Singh along with Kranti Priya Gupta and an American anarchist named Jack went to Japan. He met Baba Gurdit Singh in Kobe and held consultations with him.
From Yugantar Ashram, San Francisco , copies of Gadar, Gadar ki Gunj and many other publications were printed and distributed regularly. Propaganda was increasing every day. Enthusiasm kept in the air. In a public meeting held in Stockton in February 1914, Indian freedom flag was unfurled. Oaths for freedom and equality were taken. Kartar Singh was one of the main speakers in this meeting. All the people present there declared that they would all give their hard earned money to the struggle for country's freedom. Suddenly the news from Europe came that the World War I had started. They were overjoyed. In a one voice they sang "Let's return to wage a war for the country", which became the last words and orders.