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A butterfly flapping its wings in the Gulf of Mexico may cause a hurricane in North America. 

This is the so-called butterfly effect. Then, a military history enthusiast was strangely born in France in the late 18th and early 19th centuries. 

What effect would that cause? The powerful British Empire naval fleet was wiped out in front of him, and the ferocious Cossack cavalry trembled in front of him... 

This book is purely fictional, please do not compare it with real history! 
(I sincerely ask every friend who reads the book to help collect it, thank you!)