Number in order the events that started World War I.
Germany declared war on Russia and France.
Serbia refused to accept Austria's ultimatum.
Great Britain declared war on Germany after German troops violate Belgian neutrality.
Archduke Franz Ferdinand was assassinated.
Additional warring factions aligned with either Central Powers or Allied Powers.
Russia mobilized its army.
Italy signs a secret treaty with Great Britain, and eventually joins the Allied Powers.
Austria declares war on Serbia.
1. Archduke Franz Ferdinand was assassinated.
2. Austria declares war on Serbia.
3. Serbia refuses to accept Austria's ultimatum.
4. Additional warring factions align with either Central Powers or Allied Powers.
5. Russia mobilizes its army.
6. Germany declares war on Russia and France.
7. Great Britain declares war on Germany after German troops violate Belgian neutrality.
8. Italy signs a secret treaty with Great Britain and eventually joins the Allied Powers.
1. Archduke Franz Ferdinand was assassinated.
2. Austria declares war on Serbia.
3. Serbia refuses to accept Austria's ultimatum.
4. Russia mobilizes its army.
5. Germany declares war on Russia and France.
6. Additional warring factions align with either the Central Powers or Allied Powers.
7. Great Britain declares war on Germany after German troops violate Belgian neutrality.
8. Italy signs a secret treaty with Great Britain and eventually joins the Allied Powers.
To number the events that started World War I, we need to understand the chronological order in which they occurred. Here is the correct order:
1. Archduke Franz Ferdinand was assassinated.
2. Serbia refused to accept Austria's ultimatum.
3. Austria declares war on Serbia.
4. Russia mobilized its army.
5. Germany declared war on Russia and France.
6. Great Britain declared war on Germany after German troops violated Belgian neutrality.
7. Additional warring factions aligned with either the Central Powers or Allied Powers.
8. Italy signs a secret treaty with Great Britain and eventually joins the Allied Powers.
By following these events, we can see how tensions and actions between different countries ultimately led to the outbreak of World War I.