The 1806–07 War of the Fourth Coalition, which pitted France against an alliance led by Prussia and Russia, climaxed in the Prussian burg of Friedland (present-day Pravdinsk, Russia). It was there the French field-tested doctrines that would dominate artillery tactics for the next 130 years.
On June 13, 1807, Napoléon sent some 15,000 troops of his reserve corps
