Systematic Attacks of the Yankee Investor
Robert E. Lee was not alone in seeing the true reasons for the war prosecuted by the North, and the opportunity the latter saw in reducing the American South to a politically-weak economic colony.  The bounty-enriched foreign mercenaries and displaced slaves used to fight its war of conquest were expendable tools for the task, and later employed to eradicate Indians in the way of progress and profit.
Bernhard Thuersam, Director
Cape Fear Historical Institute 
Systematic Attacks of the Yankee Investor:
“Certainly he must have sensed that in the future “those people,” as he called his Northern adversaries, were determined to push aside “his people” with their aristocratic prerogatives and privileges. Despite his determination to stay out of politics both during and after the war, Lee could see the handwriting on the wall as plain as anyone, and plainer than most.
He understood that in addition to the sharp odor of gunpowder, there was the sweet smell of profits in the balmy spring air. Lincoln’s Secretary of the Treasury, visiting New York earlier that spring, had noted that many people there paid more attention to the stock market than to the casualty reports. To this a New York editor added: “Real or professed patriotism may be made to cover a multitude of sins. Gallantry in battle may be regarded as a substitute for all the duties of the Decalogue.”
In the Northern States, the rapid transformation from a conglomeration of farmers to a nation of industrialists had been hastened by the war. The exclusion of Southern planters from the halls of government made the change considerably easier. Astronomical profits on wartime speculation and gouging encouraged rapid expansion. While the brave boys in

[blue] shed blood on the battlefields, the crafty made profits back home.
If the drama of collapse and surrender centered in the South, the drama of growth and expansion focused on the West. Hundreds of millions of dollars would go there; the receding frontier would be whittled down by systematic attacks of the Yankee investor. The Federal government would help by showering the railroads and settlers with land and services. Mines, cattle and farming would boom. Where bayonet had never been, the dollar would invade and conquer.”
(Lee After the War, Marshall W. Fishwick, Dodd, Mead & Company, 1963, pp. 39-40)