Final answer:
The subject of this question is History. The student is asking about an event in which Choctaw land was ceded to the state of Mississippi. This event holds historical importance in the context of Native American relations.
Step-by-step explanation:
The subject of this question is History. The question is asking about the event where more than 7.5 million acres of Choctaw land were ceded to the state of Mississippi. This event is a significant part of the history of Mississippi and Native American relations.
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