The Guardia alla Frontiera (GaF), was an Italian Army Border guard created in 1937 who defended the 1,851 km of northern Italian frontiers with the so-called "Vallo Alpino Occidentale" (487 km with France), "Vallo Alpino Settentrionale" (724 km with Switzerland and 420 km with Austria) and "Vallo Alpino Orientale" (220 km with Yugoslavia). By 10 June 1940 (Italy's entry into the war) the GaF (not counting colonies in Libya and Albania) contained 23 sectors, 50,000 men, 28 battalions "Vallo Alpino", and 22 battalions of fascist militia.