Complex sentence: Throughout his life Train was engaged in the mercantile business in Boston and in Australia, then went to England in 1860 and undertook to form horse tramway companies in Birkenhead and London where he soon met opposition.
Split into simpler sentences: Throughout his life, Train was engaged in the mercantile business in Boston and in Australia. In 1860 he went to England to found horse tramway companies in Birkenhead and London, where he soon met opposition.