In the 1960s, voting rights were at the forefront of many Americans’ minds. Nearly 100 years had passed since the 15th Amendment outlawed voting restrictions “on account of race, color, or previous condition of servitude.” But threats of violence, literacy tests, and extra fees still prevented many Black voters from exercising their constitutional right at the polls.

The United States Army is older than the nation it protects and defends. Established more than a year before American independence was declared, the U.S. Army—America’s first national institution—has played a vital role throughout our history.

World War II, the deadliest military conflict in history, erupted in Europe on September 1, 1939, when Germany invaded Poland.

During World War II, navigating the Pacific Ocean's perilous tides and currents posed a constant challenge to the U.S. Navy. To update their maps and intelligence, the Navy established an Oceanographic Unit in 1943. The team of scientists was led by Mary Sears, a marine biologist commissioned as a lieutenant junior grade in the women’s division of the Naval Reserve, the WAVES.

After the Civil War, the federal government established a War Department agency to help Americans transition from slavery to freedom. The Freedmen’s Bureau (1865–72) issued rations, operated hospitals and helped establish schools and unite families. It worked to resolve labor disputes and negotiate labor contracts. It also presided over and documented marriages between freed couples.