The reason why the United States economy became more reliant on money in the late 1800's because of the Civil War. The U.S needed to pay for the expenses of transporting soldiers, feeding them, and etc. Going to war is not free, and it is a very hefty price when a country goes to war. Because of this, the United States started to compose what is now called "income tax." The income taxed made citizens pay to help fund the war. After the war, they also needed money to rebuild the South.
 
        
                    
             
        
        
        
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The plantation system developed in the American South as the British colonists arrived in Virginia and divided the land into large areas suitable for farming. Because the economy of the South depended on the cultivation of crops, the need for agricultural labor led to the establishment of slavery.
 
        
                    
             
        
        
        
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British development of tanks rejected by army in feb 1915