Appeasement was used by the leaders of Britain and France toward Hitler when he was violating the Treaty of Versailles by crossing into demilitarized zones and taking lands through force. The significance of appeasement is that it was meant to maintain peace, it did the opposite.

Operation Overlord was a very successful surprise invasion planned by the Allies. It is significant because it was a large step toward victory for the Allies, now that they liberated France. However, the battle was also very dangerous. Around 72,911 people were either killed or missing.

The Manhattan Project was the secret research that created the atomic bomb. The significance of America's atomic bomb is that while just 78 years ago, America was the only nation with an atomic bomb, today, nine countries have nuclear weapons. This shows the huge technological advancements that have been made.

The United Nations was established after WWII and still exists today. In addition to peacekeeping, the UN also focuses on global issues such as human rights and climate change. It has 193 member states.

Pearl Harbor was the event that led America into World War II. It is highly significant because of the anger it provoked in Americans towards Japan, including forcing the Japanese to move into concentration camps.

The Four Freedoms were first mentioned in a speech by FDR. These freedoms were important because they gave a sense of purpose to Americans for fighting in the war. In addition, artist Norman Rockwell's paintings of the Four freedoms helped to raise a lot of money for the war.

The Navajo Code Talkers were 29 selected Navajo men who would translate and encrypt messages for American troops. They rapidly sped up translation and the code was never decrypted. This was just one example of how Native Americans served during the war. About 25,000 Native Americans enlisted to fight too.

Island hopping was a strategy used by General Douglas MacArthur. The US used this strategy to move closer to Japan. This strategy was vital for the US to take control of the islands that were controlled by the Japanese, ultimately leading to Allied victory. Throughout the fights on these islands, Allied troops saw how resistant and devoted the Japanese were to the war.

Rosie the Riveter was a symbol of women's power, to encourage females to work in the workforce. Because many men were fighting in the war, women's contributions were very important. Over 6 million women entered the workforce during the war, and 35% of the workforce was women. Today, 46.6% of the workforce is women.

The Executive Order 9066 forced all Japanese people living on the West Coast to leave their homes and go to "relocation centers". This tied in with what Hitler was doing to Jews and minorities. Although it is true that America did not make the conditions to the extremity of German concentration camps in Europe, both scenarios involved innocent people being confined simply due to race/religion.

Vehicles for Victory was an example of how industries were mobilized for war. In particular, automobile plants became used for war efforts, producing tanks, trucks, and even airplane engines. According to nationalww2museum.org, out of the 691,455 automobiles that Ford made in 1941, only 160,000 were for civilians. The rest were for the war.

Adolf Hitler taught people a lot through his unthinkable actions. First, he showed how a charismatic leader could capture the hearts of citizens during times of crisis. He was an example of why appeasement does not always work. Finally, his concentration camps changed the world. About 6 million Jews lost their lives in the Holocaust.

Joseph Stalin ruled the USSR and made it a communist dictatorship. Stalin was significant because he brought the USSR into the cold war with the US. During his presidency, he killed at least 9 million people. Under Stain, the citizens of the USSR lost all freedoms and were forced to glorify Stalin.

President Franklin D. Roosevelt led the US into World War II. The US citizens originally took on a stance of neutrality, but FDR tried to move people away from isolationist beliefs. He passed several acts to help the Allies. One of the most significant parts of his presidency was the speech he gave the day after the attack on Pearl Harbor. Overall, FDR was considered a very good president.

President Harry Truman succeeded FDR. Perhaps the most important part of his presidency was when he decided for America to drop the atomic bomb on Japan. At the present moment, it ended the war and killed countless civilians. However, it also sparked the Cold War and the arms race.

War Bonds were used to finance the costs of the war and were also used during WWI. Norman Rockwell's 4 Freedom artworks were sold as war bonds raising more than $130 million dollars. The money from war bonds funded arms, uniforms, medicine, food, and more for the military.

Douglas MacArthur was a General who commanded Allied troops during WWII. Aside from island hopping and returning to the Philippines to gather American soldiers, he commanded the United Nations Army in the Korean War. He ended up saving the US troops from defeat.

The Doolittle Raid was a surprise attack on Tokyo in response to the attacks on Pearl Harbor. Although it did not do much damage to the Japanese, it affected their morale and boosted American spirits. This battle was just one example of how important morale is during a war.

Victory gardens were one of many conservation efforts that the government had implemented during the war. They were also used during WWI. According to Smithsonian Institute, about half of all American families had a victory garden during WWII.

The Tuskegee Airmen were significant because they were the first African American pilots to serve in the military. Although they had to live in racially segregated units, the army became integrated in 1948, through Executive Order 9981.