Why was the Cleveland Massacre significant in the formation of Standard Oil?

the Cleveland Massacre was significant in the formation of Standard Oil because through it, Standard Oil absorbed 22 of its 26 competitors. ... Thus, Rockefeller used the South Improvement Company to obtain large leverage in the production of smaller oil refineries to join or be purchased by Standard oil.

Explanation:

The Cleveland Massacre refers to a three month period in 1872 when Standard Oil Company acquired virtually all its competing oil refineries in Cleveland, Ohio. During a six week span in February and March of 1872 Standard Oil acquired 22 of 26 rival refineries at highly discounted rates.

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