what action did congress take in the late 1800s to relieve
the supreme court's overloaded docket?

Congress established the Court of Appeals by Congress in 1891, it was established as “gatekeepers” to relieve the Supreme Court of much of the burden of hearing appeals from the district courts

Explanation:

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“the iliad” (gr: “iliás”) is an epic poem by the ancient greek poet homer, which recounts some of the significant events of the final weeks of the trojan war and the greek siege of the city of troy (which was also known as ilion, ilios or ilium in ancient times).