the general bartolomé mitre railway (fcgbm) (native name: ferrocarril general bartolomé mitre), 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.