Final answer:
The Anaconda Plan was a military strategy used by the Union during the American Civil War to weaken the Confederacy. It included blockade of Southern ports, liberation of slaves, and seizure of the Mississippi River.
Step-by-step explanation:
The Anaconda Plan was a military strategy employed by the Union during the American Civil War. It consisted of several components aimed at weakening the Confederate forces. The option that was not part of the plan is the development of the railroad into the western states. The plan mainly focused on blockading Southern ports, liberating slaves to cause internal chaos, and seizing the Mississippi River.
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