World War I: The Western Front, March - September 1918

Following the re-election of President Roosevelt, America begins building its Navy fleet as the debate whether to enter the war or not continues.

At 9 O'clock on Sunday, 1945, the war finally comes to an end, following the victory of the Allied forces.

Even men toughened by combat, were sickened by the sight of the horrors of Concentration Camps.

On D-Day, June 6, 1944, an Allied force led by General Dwight D. Eisenhower launched the greatest amphibious invasion of all time against German defenses on the coast of Normandy, France.

On December 7, 1941, Japanese airplanes strike the U.S. naval base at Pearl Harbor, bringing the United States into World War II.

As in Poland, the blitzkrieg was violent, brutal and well executed.

On Sept 1, 1939, Hitler unleashed his blitzkrieg. "Our strength is in our quickness and in our brutality," he screamed, "Be hard. Be without mercy."

On July 2, 1976, North and South Vietnam were finally unified.

On January 23, 1973, the agreement on ending the war and restoring peace in Vietnam was initiated.

Learn how a what was supposed to be a step towards ending the war, only made it worse.

Two American destroyers were attacked by North-Vietnamese, although they took almost no damage, USA's retaliation escalated the war.

Once the reunification election did not take place, Ho Chi Min turned to a military solution, thus starting the Second Hindu-Chine war.

To aid the Vietminh fight the Japanese, the USA supplied the Vietminh with arms and ammunition.

On Dec. 19, 1946, the first Hindu-China war began.

The treaty was designed to free the small ethnic groups from Germany's reign and make sure the power hungry Germany could not ravage France again.

Beating infectious diseases: Learn how a nationwide mobilization led by Jonas Salk eradicated polio from American society.

An average hurricane lasts more than a week and has an average diameter of over 300 kilometers.

The Galapagos Islands take their name from the giant land Tortoises that live there.

The typical thunderstorm cloud, is the cumulonimbus also knows as the Thundercloud.