I believe the answer is: To control trade along the Mississippi River.
By controlling the Mississippi river, Thomas Jefferson believe that they could eliminate british influence in products distribution to different states. He counted that the amount of products transported from this river could accounted to around 500 million tons of shipped goods per year.
Stalin did partly succeed in achieving his aims for the transformation of the Russian economy.
Ladders are approved from OSHA
The single event that most tarnished Ford's presidency was his decision to pardon Nixon. He also, however, presided over the worst US economy since the Great Depression.