Eminent scientist, inventor, engineer, and innovator who is credited with inventing the first practical telephone.

Japan launched a surprise attack on this American naval base in Hawaii at the end of 1941, thus entering the U.S. into World War II.

The era of a state of tensions between the U.S. & Soviet Union without any actual direct fighting between the two from 1945-1989.

World peace-keeping representative body that replaced the ineffective League of Nations.

World representative peace keeping organization formed after World War I. It would be a failure because the U.S. never joined it.

American inventor; developed devices that greatly influenced life, e.g. phonograph, motion picture camera, electric light bulb.

The Nazi program of systematic extermination of European Jews, resulting in the murder of 6 million, 2/3 of Europe’s Jews.

First man-made Earth satellite. It was launched by the Soviet Union in 1957.

German submarines that controlled the open Atlantic Ocean in World War I.

The good guys (Britain, Soviet Union, U.S.) & the bad guys (Germany, Italy, Japan) of World War II.

American brothers, inventors, and aviation pioneers who invented and built the world's first successful airplane.

In June 1944; the largest amphibious military landing in history; U.S., British, & Canadian troops invaded the Nazi-held beaches of France.

The Soviets built a concrete wall between the eastern & western halves of this German city (1961-1989).

The successful massive invasion of German-held northern Africa by the U.S. & Britain in late 1942.

The good guys (Britain, France, Russia, U.S.) & the bad guys (Germany, Austria-Hungary, Ottoman Empire) of World War I.

French artist and physicist, recognized for his invention of a process of photography. He was also an accomplished painter.

Japan invaded this Chinese province in 1931. Many view this as the first step toward World War II.

The Soviet Union threatened, but failed, to put nuclear missiles here in 1962; the closest the world ever came to a nuclear war.

The massive 1941 German invasion of the Soviet Union in an attempt to exterminate the Russian population.

Soviet-led defensive military alliance that was the communist equivalent of NATO.

Italian inventor; worked on long distance radio transmission and a radio telegraph system. He is credited as being the inventor of radio.

The two Japanese cities that had atomic bombs dropped on them by the U.S. in an effort to quickly end WWII.

Civil war in SE Europe in 1990s that saw various ethnic groups slaughtered. Most devastating conflict in Europe since end of WWII.

Peace treaty that ended the war between Germany and the Allies. It was quite severe toward Germany.

The balance of power that existed in Europe from the end of the Napoleonic Wars (1815) to the outbreak of World War I (1914).