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Theodore Roosevelt proclaimed Devil's Tower in Wyoming as the first national monument on September 24, 1906.

The first swivel chair was invented by Thomas Jefferson and is presumed to be the chair he sat in while drafting the United States Declaration of Independence in 1776.

Most people assume English is the official language of the United States. However, while that might be the case in many states, the federal government has never declared an official language.

Though the belief that the Civil War ended when Robert E. Lee surrendered to Ulysses S. Grant on April 9, 1865, is common, it is inaccurate. After the Battle of Appomattox Court House in Virginia on April 9, 1865, it took a month for the Union to claim victory. Once confederate Joseph E. Johnston surrendered his army on April 26, 1865, the war was all but over. President Andrew Johnson officially declared victory on May 9, 1865.

Down-Easters are from Maine. The phrase originates from sailing terminology.