In 1933, prime minister Juddha Shumsher removed the C-class Ranas from the roll of succession and banished them from Kathmandu.
Mahabir and Subarna were black-listed by the Rana regime and any contact with the king was forbidden, but with the help of Boris Lisanevich the three were able to meet in secret.
[1] The Akhil Bharatiya Gorkha League was established in May 1945 with the goal of raising the sociopolitical consciousness of former Gurkhas in India.
In 1947, a wing of the party under the leadership of Purna Singh Khawas joined Subarna Shumsher in preparation for an armed struggle against the Rana regime.
[1] After the appointment of Mohan Shumsher as prime minister, the implementation of the 1948 Constitution was stopped and assets from some C-Class Ranas were confiscated.
Subarna also convinced his nephew Thirbam Malla, the son of the King of Galkot and a captain in the Indian army to join the Mukti Sena.
Eventually the party attracted the support of people that were dissatisfied with factional politics in Nepali National Congress, Gorkha ex-servicemen and former members of the Indian Army.