After the United States entered the war, daily life was affected for most as men prepared for battle, women began working, and children and families had less time to spend together. Children were affected as many of their fathers were killed or maimed in battle, and their mothers began working long hours in the factories. As the war progressed, technology advanced and industry boomed, enabling women to spend less time on household chores and more time outside of the home.[8] The American family began to change as women started working more regularly, which affected the role of the child in American life.[2]

America’s traditional policy of open immigration had ended when Congress enacted restrictive immigration quotas in 1921 and 1924. The quota system allowed only 25,957 Germans to enter the country every year. After the stock market crash of 1929, rising unemployment caused restrictionist sentiment to grow, and President Herbert Hoover ordered vigorous enforcement of visa regulations. The new policy significantly reduced immigration; in 1932 the United States issued only 35,576 immigration visas.

The Tuskegee Airmen were the first African-American military aviators in the United States armed forces. During World War II, African Americans in many U.S. states were still subject to the Jim Crow laws[N 1] and the American military was racially segregated, as was much of the federal government. The Tuskegee Airmen were subjected to racial discrimination, both within and outside the army. All black military pilots who trained in the United States (including five Haitians) trained at Moton Field and Tuskegee Army Air Field, located near Tuskegee, Alabama.

The 1st American Volunteer Group (AVG) of the Chinese Air Force in 1941–1942, nicknamed the Flying Tigers, was composed of pilots from the United States' Army Air Forces (USAAF), Navy (USN), and Marine Corps (USMC), recruited under presidential authority and commanded by Claire Lee Chennault. The ground crew and headquarters staff were likewise mostly recruited from the U.S. military, along with some civilians.

Code talkers were people who used obscure languages as a means of secret communication during wartime. The term is now usually associated with the United States soldiers during the world wars who used their knowledge of Native-American languages as a basis to transmit coded messages. In particular, there were approximately 400-500 Native Americans in the United States Marine Corps whose primary job was the transmission of secret tactical messages. Code talkers transmitted these messages over military telephone or radio communications nets using formal or informally developed codes built upon their native languages. Their service improved communications in terms of speed of encryption at both ends in front line operations during World War II.

If operational as is believed, the system marks the first time a ballistic missile has been successfully developed to attack vessels at sea. Ships currently have no defense against a ballistic missile attack.

Along with the Chinese naval build-up, U.S. Navy officials appear to view the development of the anti-ship ballistic missile as a tangible threat.