Società Italiana Ernesto Breda, more usually referred to simply as Breda, was an Italian mechanical manufacturing company founded by Ernesto Breda in Milan in 1886. The firm originally manufactured locomotives and other railway machinery, but later branched out into armaments and aircraft. Occasionally, not continuously, the company also built trolleybuses. In 1962, it was nationalised as part of EFIM, but was liquidated in the 1990s. The train and tram manufacturing division fused with Ansaldo to form AnsaldoBreda, the armaments division became an independent entity as Breda Meccanica Bresciana, as did the research division as Istituto Scientifico Breda.