WWI was the first war in which this new invention was used, although at first was just for reconnaissance.

With Hitler's invasion of this country, the war officially began.

The Cold War was fought between the U.S. and the Soviet Union over the expansion and containment of this economic ideology.

This Baptist pastor from Georgia led public rallies and protests against unjust laws, only to be assassinated in 1968.

This president was the only president to be elected four times, dying during his fourth term.

This definition of this word is a situation in a war when both sides cannot take further action.

These were the two unfortunate Japanese cities that were chosen as targets of the atomic bombs.

In 1962, President Kennedy discovered that the Soviet Union was hiding these in Cuba.

In 1960, four college students staged a sit in at this type of place.

This man was president during WWI, who in vain tried to present a lenient punishment for Germany.

The U.S. became involved in WWII when the foreign minister of Germany was caught sending this secret message to Mexico.

The Normandy Invasion, planned by Dwight Eisenhower, launched with this famous day.

The Cold War ended partially due to the relationship between the Soviet leader Gorbachev and this American president.

This man was the first black American to break the color barrier and play Major League Baseball.

This man was a general in Europe in WWII who later on became a president in the 1950s.

Although the war started in 1914, the U.S. didn't join until this later year.

After Pearl Harbor, the U.S. responded with this daring attack on mainland Japan.

The U.S. landed astronauts on the moon due to this competition with the Soviet Union.

The Civil Rights Acts of 1964 and 65 prevented measures that inhibited blacks from doing this right given to them in the 15th Amendment.

This president made great advancements in international relations, but is mostly known for his Watergate scandal.

It was in this European city that the leaders of the U.S., Britain, France, and Italy met to determine Germany's punishment.

Members of this particular Native American tribe worked to decode secret messages, greatly helping the U.S. in the South Pacific.

In the Vietnam War, the North Vietnamese were called by this name.

These unjust laws legally segregated blacks and whites in public places.

This man was the only person in American history to not be voted as vice president or president, but become both of them.