History, in generations
How many generations ago did World War I begin?
World War I is commonly dated from July 28, 1914, when Austria-Hungary declared war on Serbia. This page calculates the generations since that declaration, rather than from the assassination that preceded it.
From July 28, 1914 to October 16, 2026
4.5generations
About 112 years, using an average of 25 years per generation.
This page uses July 28, 1914, when Austria-Hungary declared war on Serbia. The assassination of Archduke Franz Ferdinand on June 28 was a major preceding event, but it was not the formal start of the war.
Try this date in the calculatorFrom the assassination to war
Archduke Franz Ferdinand was assassinated in Sarajevo on June 28, 1914. A month later, Austria-Hungary declared war on Serbia. Alliances and further declarations drew many countries into the conflict.
Using the declaration date gives this calculation a specific, reproducible start. Historical accounts sometimes describe the crisis or mobilization as the beginning, so the chosen convention is stated here.
How the generations are counted
The estimate divides elapsed time since July 28, 1914 by 25 years. It is a broad comparison of elapsed time, not a family tree calculation.
Frequently asked questions
When did World War I begin?
Austria-Hungary declared war on Serbia on July 28, 1914, the date commonly used as the start of World War I.
Did World War I begin with the assassination of Archduke Franz Ferdinand?
The assassination on June 28, 1914 triggered the July Crisis. The formal war began when Austria-Hungary declared war on Serbia on July 28.