Napoleon III felt insulted by a telegram altered by Bismarck
German confederation
It caused Great Britain and France to declare war on Germany.
German Confederation was created in 1815.
German Confederation ended in 1866.
United Kingdom of Great Britian and Ireland, France , Spain
The British declared war on Germany during World War I because Germany violated Belgian neutrality by invading Belgium in August 1914, which was seen as a threat to British interests and potential aggression towards Britain. In World War II, the British declared war on Germany after Germany invaded Poland in September 1939, triggering Britain's declaration of war to honor their commitment to defend Poland's sovereignty.
The German attack on Poland on 1 September 1939
North German Confederation ended in 1871.
North German Confederation was created in 1866.
The German Confederation was larger in 1871 because in the early time of 1815 they had just begun the German confederation.
The German invasion of Poland on September 1, 1939.