World War I
This archduke was assassinated in Sarajevo in 1914, triggering the war.
Archduke Franz Ferdinand
The war officially began when Germany invaded this country in 1939.
Poland
This period of tension began after World War II between these two nations.
The United States and the Soviet Union
This nation invaded Belgium in August 1914, leading Britain to declare war.
The German Empire
This surprise Japanese attack in 1941 led the United States to enter the war.
Pearl Harbor
This military organization was formed by the United States and its European allies in 1949.
NATO
The battle lines were characterized by this defensive fortification.
Trenches
These bombings in 1945 forced Japan's unconditional surrender.
Hiroshima and Nagasaki
Apollo 11
This treaty ended World War I.
The Treaty of Versailles
This battle was the crucial turning point in the war on the Eastern Front.
The Battle of Stalingrad
This event in November 1989 symbolized the end of the Cold War.
The fall of the Berlin Wall
This German military plan failed to quickly capture Paris at the start of the war.
The Schlieffen Plan
The 201st Squadron of the Mexican Air Force fought in this area of the Pacific War.
The Philippines.
This event in 1962 brought the superpowers to the brink of nuclear war.
The Cuban Missile Crisis