The first electric trial runs using single-phase alternating current were made in 1903 on the line Seebach – Wettingen together with the Maschinenfabrik Oerlikon (MFO), using the future Ce 4/4 locomotives ("Eva" and "Marianne"). The electrification of the network started 1919, motivated by the coal shortages during the First World War, and new electric locomotives were introduced: Ce 6/8 II/Ce 6/8 III "Crocodile" (1920/1926), Be 4/6 (1920), Be 4/7 (1921), Ae 3/6 I (1921), Ae 3/6 II (1924), Ae 3/6 III (1925), Ae 4/7 (1927) and Ae 4/6 (1941). A shift of paradigms happened in 1946, when the age of modern bogie-based locomotives without trailing axles started with the Re 4/4 I (1946), followed by the Ae 6/6 (1952), Re 4/4 II/Re 4/4 III (1964/1971), Re 6/6 (1972), Re 450 (1989) and Re 460/Re 465 "Lok 2000" (1992/1994). The delivery of the last Re 465 marked the end of the Swiss locomotive industries with the closure of the Swiss Locomotive and Machine Works. The Swiss Federal Railways were split into three divisions: Passenger, Freight and Infrastructure, each with independent locomotive supply policies. Because the Passenger division got all modern Re 460s and opted for multiple unit trains, mainline locomotives were bought only by the Cargo division, namely Re 482 "Traxx F140 AC" (2002), Re 484 "Traxx F140 MS" (2004) and Re 474 "ES64 F4" (2004). The first multiple units originated from the Seetalbahn, which was formed in 1922. Larger series were uncommon until after 1950: Be 4/6 (1923), De 4/4 (1927), BDe 4/4 (1952), RBe 4/4 (1959), RBDe 560 "NPZ" (1984) and RABe 520 "GTW" (2002). The first multiple unit trainsets were bought for the introduction of the Taktfahrplan on the line Zurich–Meilen–Rapperswil in 1967: RABDe 12/12 "Mirage" (1965) and RABDe 8/16 "Chiquita" (1976).