Answer: In 1862, Congress mandated that civil servants and military personnel take an Ironclad Test Oath that they had never voluntarily aided the Confederacy. As Reconstruction evolved, the Ironclad Oath emerged as the strictest of several possible standards for the readmission of Southerners into the political life of the Union. So basicly the oath was to stay loyal to the union, and never the confederates.
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imhoptep the second king of Egypt's third dynasty, who is later worshiped as the God of medicine and Egypt and in Greece.
Explanation:
Wikipedia.
Cotton gin, steam engine, and I seriously can't think of a third.
The plantation system developed in the American South as the British colonists arrived in Virginia and divided the land into large areas suitable for farming. Because the economy of the South depended on the cultivation of crops, the need for agricultural labor led to the establishment of slavery.