111. Why did the United States enter the Vietnam War?

To stop the spread of communism
100. Name one war fought by the United States in the 1900s.

World War I World War II Korean War Vietnam War (Persian) Gulf War
57. When must all men register for the Selective Service?

at age eighteen (18) between eighteen (18) and twenty-six (26) President Lincoln tried to draft men to fight during the Civil War, but many people became angry and rioted. In 1917, Congress passed the Selective Service Act. This act gave President Woodrow Wilson the power to temporarily increase the U.S. military during World War I. […]
54. How old do citizens have to be to vote for President?

eighteen (18) and older For most of U.S. history, Americans had to be at least 21 years old to vote. At the time of the Vietnam War, during the 1960s and 1970s, many people thought that people who were old enough to fight in a war should also be old enough to vote. In 1971, […]