The hot line had an important purpose: to prevent accidental war between the two competitors during the period known as the Cold War.

VOA: special.2009.12.06

During the period of the Cold War, an estimated 30 million people in Eastern Europe and the Soviet Union listened to him on the radio.

VOA: special.2009.01.30

But others now say this period after the Civil War was a necessary step in creating a different kind of South from the one which had existed before.

VOA: special.2010.02.04

Rome was going through a period of civil war.

VOA: special.2011.02.16

"These are terrorist attacks," "This is not a civil war,period.

VOA: standard.2009.12.11

"Historically it's one of the most important parts of the period of World War II in France,the roundup - the rafle du Vel dHiv - is a symbol of collaboration between the French police and the German occupying authorities."

VOA: standard.2010.04.10