My answer is The Union was able to stop Confederate supplies from entering Florida.
The start of the American Industrial Revolution is often attributed to Samuel Slater who opened the first industrial mill in the United States in 1790<span> with a design that borrowed heavily from a British model.</span>
<span>The most logical answer would be cotton. With Texas as such a large state and having such a large ability to produce such a plant, this would add such a glut to the cotton market that it would drive down overall prices significantly.</span>