Dominion started from one Toronto store on May 23, 1919. The store was founded by American businessmen Robert Jackson of New Hampshire and William J. Pentland of Connecticut. Pentland was manager of A&P stores in Connecticut and was hired by Jackson. By the end of 1919, they had a 20-store chain of which 18 were acquired from rival Loblaws. A year later, they had 61 stores. In 1929, Dominion tried to acquire a stake in Loblaws, but the stock market crash ended the growth. During the Depression, Dominion lost both founders: Jackson went bankrupt and Pentland was killed in an auto accident in 1933.