By 1900, which new country emerged as a powerful force in europe?

Germany.

Explanation:

By 1914, Germany had already turned into the greatest industrial power in Europe. After this significant evolution, the country achieved a prestigious and powerful image. It was followed by France, but France was far from having the same industrial power.

Two key factors for this empowerment were population growth and the rise of the working class. Also, Germany's railroad extension (which was thought to be a strategy for the mobilization of troops in case of an armed conflict) significantly stimulated the economy through the activity of the steel, pig iron and coal industries.

napoleon the third became a empire in 1873 also known as the era of the franco-prussian war.