To have control of the boats and trade.
Siezing control of the Mississippi River was an important goal of the Union Navy because it was the major means of transportation and logistical communications in the U.S. interior.
During the American Civil War, controlling the Mississippi River was an important part of the overall Union strategy for two reasons. It would, first of all, cut the South in two and thereby weaken it militarily and otherwise. Second, it would open up the Deep South to invasion by Union land forces.
Coup d'état
After seizing control of the Assembly, the radicals wrote a new declaration of rights and constitution modeled after the USA.
John Brown
Seizing
The Union Strategy was known as the Anaconda Plan. Scott's plan involved blockading southern ports and seizing control of the Mississippi River Valley, depriving the South of supplies or the ability to easily transport troops and supplies, squeezing the life out of the Confederacy. Later commanders elaborated on the plan by adding control of the Cumberland and Tennessee Rivers and, later still, adding Total War to completely destroy the South's infrastructure, causing the complete collapse of the economy and preventing supplies from getting to the soldiers in the field, and destroying enemy military and civilian morale.
opportunity seizing
Because the French felt that they should punish them.
Conspiratorial
Conspiratorial
Conspiratorial