How did the Congress of Vienna in 1815 affect European countries?

the treaty of brest-litovsk was a peace treaty signed on 3 march 1918 between the new bolshevik government of russia and the central powers (german empire, austria-hungary, bulgaria, and the ottoman empire), that ended russia's participation in world war i.

according to worldatlas.com, the u.s. has an 86% literacy rate.

the main objectives of the progressive movement were eliminating problems caused by industrialization, urbanization, immigration, and political corruption.

the two atomic bombs dropped on japan in 1945 killed and maimed hundreds of thousands of people, and their effects are still being felt today. the uranium bomb detonated over hiroshima on 6 august 1945 had an explosive yield equal to 15,000 tonnes of tnt.