- 1805 – Lewis and Clark begin their journey to the Pacific Ocean, accompanied by Sacagawea and her two-month old baby, Jean-Baptiste Charbonneau.
- 1860 – First Pony Express comes to Utah.
- 1890 – Marjory Stoneman Douglas is born. She was a writer, suffragist, women’s rights advocate, environmentalist and championed the culture of first Americans. She also created “Friends of the Everglades” with a million acres established in 1978 as the Marjory Stoneman Douglas Wilderness Area. She lived to be 108.
- 1891 – Martha Eliot is born. She became a pediatrician who researched and proved the beneficial effects of cod liver oil and sunbaths to prevent rickets. She wrote provisions for dependent and crippled children in the 1935 Social Security Act, and was the only woman to sign the constitution of the new World Health Organization in 1947.
- 1954 – President Eisenhower delivers his Cold War “domino theory” speech, when he suggested the fall of French Indochina to the communists could create a “domino effect” in Southeast Asia. This theory dominated US thinking about Vietnam for at least the next decade.
- 1961 – Thurl Bailey is born.
- 1987 – The National Museum of Women in the Arts opens in Washington, D.C. It is the first museum devoted to women artists.
- 2003 – US troops capture Baghdad.