Mighty Haag Circus was started by American entrepreneur Ernest Haag (17 June 1866 - 1 Feb. 1935) in Shreveport, Louisiana. His circus toured continuously for over 40 years, from 1891 to 1938. During these years, the circus used a variety of types of transport: boat, carts, trains, horse-pulled wagons, and trucks. It was one of the largest traveling circuses in the United States.