What was the Treaty of Frankfurt?

The Treaty of Frankfurt ended the Franco-Prussian war and marked the entry of a newly unified Germany which was dominated by the empires of England and France for a long time. This treaty made France pay them an indemnity of 5 billion Francs and kept an army in France until it had been paid. Because of this, France surrendered Strasburg, Alsace and part of Lorraine to Bismark.