Explanation:
Following the great flood of 1927, the Army Corps of Engineers was again accused of taming the Mississippi River. Under the Flood Control Act of 1928, the world's longest levee system was built. Relief channels were built that divert the excessive flow of the Mississippi River.
The aftermath of the flood was a factor in accelerating the great migration of African Americans to northern cities. Flood waters began to recede in June 1927, but interracial relations continued to be tense. Hostilities had erupted between the races; A black man was shot by a white policeman when he refused to be recruited to unload a relief ship. As a result of displacements lasting up to six months, tens of thousands of African-American locals moved to the great cities of the North, particularly Chicago; many thousands more followed in the following decades.
The flood further enhances the reputation of Herbert Hoover, who was in charge of flood relief operations as Secretary of Commerce under President Calvin Coolidge. Hoover would later easily win the Republican nomination for the presidency, and the general election, in 1928. In northern Louisiana, anger directed at the New Orleans elite helped Huey Long's election for the governorship in 1928. Hoover was very praised for his masterful handling of refugee camps, but subsequent concerns about the treatment of blacks in those camps led him to make promises to African-Americans in the community he later broke up, losing the black vote in his campaign of re-election in 1932. several reports on the terrible situation in the refugee camps, including one by the Advisory Commission painted by Robert Russa Moton were kept, from the media, at the request of Hoover, with the promise of new reforms for the Blacks after the presidential election. When he failed to broadcast, Moton and other influential African Americans helped change the loyalty of black Americans from the Republican party to the Democrats.
