Page "United States Grand Prix" Paragraph 10

The Indianapolis 500 kept a connection to European racing, running to Grand Prix regulations between 1923 and 1930, and from 1938 until 1953.

In the late 1920s, efforts were made to refer to the 500 as the American Grand Prize.

The Grand Prize trophy was awarded to the winner of the Indianapolis 500 between 1930 and 1936, when it was replaced by the Borg-Warner Trophy.

The race was included in the World Championship from 1950 through 1960.