[3] In 1915, his father died turning over the family company to sons Louis and Charles who served as co-Directors.

[2] In 1917, the Louis Dreyfus Group was forced out of Russia by the Russian Revolution[2] catalyzing their international expansion.

Known as the "King of Wheat," the Dreyfus Group dominated the grain trade through the Great Depression and up to the outbreak of World War II[4] purchasing grain at low cost in producing countries and selling at a higher price in countries that had shortages.

[4] In July 1940, the Vichy France, under Marshal Petain, ordered confiscation of the wealth and private estates of Baron Edouard de Rothschild and Louis Louis-Dreyfus because of their Jewish heritage.

[6] He was nicknamed King Two Louis by journalist Léon Daudet[4] and – thanks to his wealth and very public profile as both a politician and businessman – was often referred to as the "Richest Man in France.