The key difference between a federal government and a confederate government is in terms of the power assignment. In a federal system, more power is assigned to the central government while for a confederate system, most of the power is given to the states. Hope this answers the question.
Well, the major reason was that Oliver Cromwell was not a monarch, he did not rule as a King. Cromwell came to the throne after leading a rebellion against the monarchy and was then invited by his fellow leaders to be the lord protector of England.
The Thirteenth Amendment(Amendment XIII) to the United States Constitution abolished slavery and involuntary servitude, except as punishment for a crime. In Congress, it was passed by the Senate on April 8, 1864, and by the House on January 31, 1865. ... On April 8, 1864, the Senate passed an amendment to abolish slavery.
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As of right now (3/17/2020) no, they haven't been canceled.
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