Unidad de Gestión Operativa Ferroviaria de Emergencia Unidad de Gestión Operativa Ferroviaria de Emergencia Unidad de Gestión Operativa Ferroviaria de Emergencia (UGOFE) was a temporary consortium of Argentine companies formed on 7 January 2005 by Ferrovías, Metrovías and Trenes de Buenos Aires to take over the running of commuter railway services in Buenos Aires after concessions granted to Metropolitano in 1994 for the operation of these services were revoked. Metropolitano, a company formed in 1994 to take over rail concessions granted by the Argentine government, as part of railway privatisation during the presidency of Carlos Menem, operated commuter rail services over Línea San Martín, Línea Roca and
Italy in the Middle Ages the invasion of the South, part of a 12th-century Byzantine effort to regain the influence it had held on the peninsula during the reign of Justinian. In the 11th century, the Normans occupied the Lombard and Byzantine possessions in Southern Italy, ending the six century old presence of both powers in the peninsula. The independent city-states were also subdued. During the same century, the Normans also ended Muslim rule in Sicily. Norman rule in what had once been Byzantine territory naturally angered Byzantium, which in 1155 made a last attempt under the Emperor Manuel I Komnenos to reassert its authority