Diseños An Impact of Mexican Cession Past Exhibit … At the end of the Mexican-American War, the United States annexed more than half of Mexico’s territory under the 1848 Treaty of Guadalupe Hidalgo. Under its terms, the U.S. promised to protect the property rights of Mexican citizens who had received land grants (ranchos) in the territory from Mexico or Spain. In 1851, Congress passed a law that required Mexican landowners in California to confirm their titles with the federal government. It was a lengthy …

Summer of 1948 A Step Forward for Equality for all in the US Armed Forces Past Exhibit … In 1940, President Franklin D. Roosevelt upheld segregation in the Armed Forces, believing integration would threaten military efficiency and increase racial tension. President Harry S. Truman eventually organized a Presidential committee and based part of his 1948 campaign on civil rights. After winning that election, Truman was stymied by congressional inaction and called for a special session of Congress.  On July …

200th Anniversary of the Monroe Document Past Exhibit … Buried in a routine annual message to Congress, President James Monroe articulated the landmark foreign policy statement known today as the Monroe Doctrine. President Monroe’s 1823 message–a precursor to the State of the Union address–warned that the United States would not tolerate further colonization of the Western Hemisphere by European governments. Though crafted in response to concerns of the time, the doctrine ultimately became a cornerstone of …

A President Resigns 50 Years Later Past Exhibit … Richard Nixon’s letter resigning the Presidency, August 9, 1974.   National Archives, General Records of the Department of State View in the National Archives Catalog Richard Nixon’s letter resigning the Presidency, August 9, 1974.   National Archives, General Records of the Department of State View in the National Archives Catalog Nixon's farewell to his cabinet and members of the White House staff, August 9, 1974.  Richard Nixon Presidential Library and …

DC Emancipation Act Past Exhibit … On April 16, 1862, President Abraham Lincoln signed a bill ending slavery in the District of Columbia . African Americans in the District greeted emancipation with great jubilation and continue to celebrate Emancipation Day with parades and festivals. The original first and signature pages will be on display. An Act of April 16, 1862 [For the Release of Certain Persons Held to Service or Labor in the District of Columbia] (DC Emancipation Act). National Archives, General …

Write to Mom Thats an order Past Exhibit … This World War I–era telegram relays the Secretary of War’s desire that all commanding  officers and soldiers write a letter home for Mother’s Day. By the date of this communication, May 6, 1919, those moms had been waiting almost six months for their children to come home. Although the Armistice was announced in November 1918, it took over a year to transport the millions of American troops stationed overseas back to the United States. Mother's Day Telegram, May …

The First National Park Yellowstone and the Hayden Survey Past Exhibit … In spring 1871, scientist, physician, and explorer Ferdinand V. Hayden (1829–87) prepared for an expedition in Wyoming and Montana Territories to survey the region around the Missouri, Snake, and Yellow Stone Rivers. Other expeditions into the area preceded Hayden’s, but Hayden is credited with spurring Congress to make Yellowstone the first National Park.  An experienced field scientist, he was among the first scientists to identify …

The Emancipation Proclamation and Juneteenth Past Exhibit … Milestones in the long struggle for American freedom Emancipation Proclamation President Abraham Lincoln issued the Emancipation Proclamation on January 1, 1863, as the nation approached the third year of the Civil War. Lincoln's proclamation, which declared "that all persons held as slaves" within the rebellious states "are, and henceforward shall be free,” was “a fit and necessary war measure for suppressing rebellion.” The Proclamation also …

50th Anniversary of Apollo 15 and the Lunar Roving Vehicle Past Exhibit … An out-of-this world road trip Only July 31, 1971, almost three years to the day after Neil Armstrong’s giant leap for humankind, Apollo 15 astronauts David Scott and James Irwin took a spin in the first set of wheels on the Moon. The lunar roving vehicle (LRV), or “Moon buggy” as it is popularly known, was specially designed for use on the low-gravity lunar surface.  Astronauts’ bulky space suits had required them to stay close to …

150 Years Ago The Great Chicago Fire Past Exhibit … The Great Chicago Fire is one of the most famous fires in American history. Although Mrs. O’Leary’s legendary cow has been exonerated, the fire’s exact origin on the night of October 8, 1871, remains unknown. Once ignited, the fire quickly raged out of control thanks to ferocious winds, extremely dry conditions, and plenty of fuel. By the time rain extinguished the final flames on October 10, the conflagration had consumed The Loop (Chicago’s central …