Commanding General His Highness Shree Shree Shree Maharaja Sir Jung Bahadur Kunwar Ranaji, GCB, GCSI (born as Bir Narsingh Kunwar (June 18, 1817, Borlang, Gorkha – February 25, 1877, Patharghat, Rautahat; popularly known as Jung Bahadur Rana is a Khas Rajput ruler of Nepal and initiator of the Rana Regime in Nepal.

Jung Bahadur, a man of great courage and ability, takes control of the government after killing a usurper, Gagan Singh, who had plotted to become prime minister with the junior queen in 1846 and put her son on the throne.

He was born as Bir Narsingh Kunwar but he becomes known by the name Jang Bahadur, given to him by his maternal uncle Mathabar Singh Thapa who used to call him Jangay as commemoration of his boldness and courage.

His mother Ganesh Kumari is the daughter of Kaji Nain Singh Thapa, brother of Mukhtiyar Bhimsen Thapa of ruling Thapa dynasty.

Through the influence of his maternal side, he enjoys privileges.

During his lifetime, he eliminates the factional fighting at the court, removes his family rivals such as Pandes and Basnyats and paves  the way for the finding of Ranas, introduceds innovations into the bureaucracy and the judiciary, and makes efforts to "modernize" Nepal.

He remains one of the most important figures in Nepalese history, though modern historians will also blame Jung Bahadur for setting up the dictatorship that repressed the nation for one hundred and fouryears from 1846 to 1951 and leaves it in a primitive economic condition.

Others exclusively blame his nephews, the Shumsher Ranas, for Nepal's dark period of history.

Rana rule is marked by tyranny, debauchery, economic exploitation and religious persecution.