Union Colonel Joshua Chamberlain and the 20th Maine Regiment make a daring downhill charge to defend Little Round Top at the Battle of Gettysburg.

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Find out how the actions of a former Maine professor helped the Union win at Gettysburg, the deadliest battle of the Civil War.

On September 3, 1939, in a radio broadcast to his nation, Prime Minister Neville Chamberlain announces that Germany's refusal to withdraw its troops from Poland after its September 1 invasion has pushed Great Britain to war.

Seeking to avoid war in Europe, leaders from Britain, France and Italy signed the Munich Pact on September 29, 1938, agreeing to Hitler's demands and ceding Czechoslovakia to Germany. Upon his return to England the following day, the architect of the appeasement policy, Prime Minister Neville Chamberlain, declares "peace in our time."

See how the Knights Templar built fortified palaces to defend the holy land.

Watch this historical clip of President Gerald Ford as he speaks in front of the judiciary committee about the impeachment of President Nixon. Elizabeth Holtzman of New York questions him about the topic. Listen and see what he had to say in this clip.

A Nazi propaganda broadcast justifies Germany's September 1939 invasion of Poland as an act of defense.