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Orleans Territory was a historic, organized territory of the United States formed out of the first subdivision of the Louisiana Purchase.
New Orleans was captured by Federal troops on April 25, 1862.
As significant portions of the population had Union sympathies, the Federal government took the unusual step of recognizing the areas of Louisiana under Federal control as a state within the Union with elected representatives who were sent to the congress in Washington, D.C. throughout the rest of the war.