How long were historical periods?

Wars, empires, eras, and generations — how long did they actually last?

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Conflicts

World War II

6 years

1939 – 1945

World War I

4 years

1914 – 1918

The Cold War

46 years

1947 – 1991

The Vietnam War (US Involvement)

20 years

1955 – 1975

American Civil War

4 years

1861 – 1865

The Hundred Years' War

116 years

1337 – 1453

The American Revolution

8 years

1775 – 1783

Empires

The Roman Empire (Western)

503 years

27 BC – 476

The British Empire

418 years

1583 – 1997

Eras & Periods

The Bronze Age

2,000 years

3,300 BC – 1,200 BC

The Middle Ages (Medieval Period)

1,000 years

476 – 1453

The Renaissance

200 years

1400 – 1600

The Age of Dinosaurs (Mesozoic Era)

186,000,000 years

252,000,000 BC – 66,000,000 BC

Reconstruction Era

12 years

1865 – 1877

The Space Race

18 years

1957 – 1975

Generations

The Baby Boomer Generation

18 years

1946 – 1964

Generation X

15 years

1965 – 1980

Millennial Generation

15 years

1981 – 1996

Generation Z

12 years

1997 – 2012
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