In the late 1910s, many Gilanis gathered under the leadership of Mirza Kuchik Khan, who became the most prominent revolutionary leader in northern Iran in this period. Khan's movement, known as the Jangal movement of Gilan, had sent an armed brigade to Tehran that helped depose the Qajar ruler Mohammad Ali Shah. However, the revolution did not progress the way the constitutionalists had strived for, and Iran came to face much internal unrest and foreign intervention, particularly from the British and Russian empires.