1870

Approximately 200 Piegan Blackfoot tribe members, mostly women, children and older adults, were killed by U.S. Army troops under the command of Maj. Eugene Mortimer Baker in Montana, in what became known as the Baker Massacre.

1849

Elizabeth Blackwell became the first woman to receive a medical degree in the United States.

1997

Madeleine Albright was sworn in as the United States’ first female secretary of state.

2020

Democratic House prosecutors presented arguments before skeptical Senate jurors at Donald Trump’s first impeachment trial over his dealings with Ukraine, accusing him of abuse of power. (The Republican-led Senate would later vote to acquit Trump.)