The Cobalt Phoenix

Point of Divergence
On August 18, 1870, the largest battle of the Franco-Prussian War commenced in the town of village of Gravelotte, 6 miles west of Metz. Despite having an advantage in artillery and numbers, the Prussian assaults were initially repelled by the entrenched French, with superior rifles, and the Prussians took massive casualties. Despite the weakened Prussian forces after their failed attack, the French did not counter, and were forced to retreat to Metz the next morning.

The Cobalt Phoenix is a timeline where this did not happen - where the French army counterattacked the Prussians and won at Gravelotte. More importantly, it seeks to answer one question - what if France won the Franco-Prussian War?