Complex sentence: During the 1970s rival "Provincial Bank" expanded rapidly through a number of acquisitions, it merges with The People's Bank in 1970, the Toronto-based Unity Bank of Canada, and in 1979 it acquired Laurentide Financial Corporation of Vancouver.
Split into simpler sentences: During the 1970s rival "Provincial Bank" expanded rapidly through a number of acquisitions. It merged with The People's Bank in 1970, with the Toronto-based Unity Bank of Canada, and in 1979 it acquired Laurentide Financial Corporation of Vancouver.