The General Bartolomé Mitre Railway (FCGBM), named after the former Argentine president Bartolomé Mitre, is one of the six state-owned Argentine railway lines formed after President Juan Perón's nationalisation of the railway network in 1948 and one of the largest of Argentina. The six divisions, managed by Ferrocarriles Argentinos were later broken up during the process of railway privatisation beginning in 1991 during Carlos Menem's presidency.

The railway natinalisation in Argentina occurred on March 1, 1948, during President Juan Perón's first term of office, when the seven British- and three French-owned railway companies then operating in Argentina, were purchased by the state. These companies, together with those that were already state-owned, where grouped, according to their track gauge and locality, into a total of six state-owned companies which later became divisions of the state-owned holding company Ferrocarriles Argentinos.