How did the Ems telegram help provoke the Franco-Prussian War?

The Ems telegram served as a critical catalyst for the Franco-German War by being deliberately manipulated to incite conflict between Prussia and France.12

Following a diplomatic encounter on July 13, 1870, where the French ambassador requested that King William I guarantee no member of his family would again seek the Spanish throne, the King politely refused the demand. A report of this meeting was sent to the Prussian chancellor, Otto von Bismarck.13

Bismarck edited the telegram to omit the polite nature of the exchange, instead making it appear as though the King and the ambassador had insulted one another. When published, this version infuriated the French government and public, creating a sense of national affront. By making it seem that Prussia had rebuffed France, Bismarck successfully provoked France into declaring war on July 19, 1870. This allowed Prussia to appear as the victim of aggression, which helped secure the support of the southern German states and ultimately led to the unification of Germany.132