(Bonus) The aftermath of World War II was the beginning of a new era for all countries involved, defined by the decline of all European colonial empires and the simultaneous rise of two superpowers; the Soviet Union (USSR) and the United States (US). Once Allies during World War II, the US and the USSR became competitors on the world stage and engaged in the Cold War, so called because it never resulted in overt, declared total war between the two powers but was instead characterized by espionage, political subversion and proxy wars. Western Europe and Asia were rebuilt through the American Marshall Plan, whereas Central and Eastern Europe fell under the Soviet sphere of influence and eventually behind an "Iron Curtain". Europe was divided into a US-led Western Bloc and a Soviet-led Eastern Bloc. Internationally, alliances with the two blocs gradually shifted, with some nations trying to stay out of the Cold War through the Non-Aligned Movement. The war also saw a nuclear arms race between the two superpowers; part of the reason that the Cold War never became a "hot" war was that the Soviet Union and the United States had nuclear deterrents against each other, leading to a mutually assured destruction standoff.

(Bonus) The Demobilization of the United States armed forces after the Second World War began with the defeat of Germany in May 1945 and continued through 1946. The United States had more than 12 million men and women in the armed forces at the end of World War II, of whom 7.6 million were stationed abroad. The American public demanded rapid demobilization and soldiers protested the slowness of the process. Military personnel was returned to the United States in Operation Magic Carpet. By June 30, 1947, the number of active duty soldiers, sailors, Marines, and airmen in the armed forces had been reduced to 1,566,000.

(Bonus) The Uranverein (English: "Uranium Club") or Uranprojekt (English: "Uranium Project") was the name given to the project in Germany to research nuclear technology, including nuclear weapons and nuclear reactors, during World War II. It went through several phases of work, but in the words of historian Mark Walker, it was ultimately "frozen at the laboratory level" with the "modest goal" to "build a nuclear reactor which could sustain a nuclear fission chain reaction for a significant amount of time and to achieve the complete separation of at least tiny amount of the uranium isotopes." The scholarly consensus is that it failed to achieve these goals, and that despite fears at the time, the Germans had never been close to producing nuclear weapons.