This is known as the Anaconda Plan.
This military strategy, developed by Union General Winfield Scott, was meant to starve the Confederacy out of their resources. Essentially, Scott felt that if the Confederacy could not trade for goods with other countries they would not be able to survive. This is due to the Confederacy's reliance on cotton as their main cash crop.
This strategy helps to explain why the US wanted to blockade trade with other countries as well as why the Union wanted to control the Mississippi River, as they knew control of this waterway could negatively impact the Confederacy's ability to transport/obtain resources.
<span>It used U-boats to sin ships carrying supplies to Britain</span>
"They interact with each other" should be the answer.
<span>England spent a lot of money trying to protect the American colonies and decided that they would tax the colonies more in order to have the colonies pay for the military costs. The taxes forced upon the American colonies made them angry and eventually led to protests and a full out revolution that the colonies won and formed the United States of America
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I think its the first one
