The war of 1870 was the Franco-Prussian war.
Franco-Prussian War happened on 1870-07-19.
The Ems Dispatch was in 1870 and angered teh French into declaring the Franco-Prussian War.
1 year 1870-1871
Franco-Prussian War 1870-1
The principal war that created Germany was the Franco-Prussian War of 1870.
Germany (Prussia) and France declared war on each other in 1870 during the Franco-Prussian War 1870-1871.
Tha Franco-Prussian War 1870-71. World War 1 1914-18.
The Franco-Prussian War 1870-1871.
A. Borbstaedt has written: 'The Franco-German war to the catastrophe of Sedan and the fall of Strassburg' -- subject(s): Franco-Prussian War, 1870-1871
The Franco-Prussian War was from 1870-1871, so nobody would be using a weapon from 1766 in the Franco-Prussian War. Without better information (including which side used the weapon - French or Germans), it would be impossible to speculate. If the term "1766" is a specific model number, I am aware of no gun that has that number.
In the Franco-Prussian War in 1870, both sides seemed to be equally balanced against each other. One significant advantage for the Prussians was that they had the most advanced artillery. Most of it was breech loading cannons.