The russian term, perestroika, referred to

Perestroika is a term that refers to political/economical movement for the reformation within the communist party of the soviet union, it is known as restructuring

Explanation:

The term Perestroika is a term that describes the political movement during the 1980s in the communist party, it was associated with the Russian leader known as Mikhail Gorbachev, perestroika is also known as a series of economic and political policies that was made to revive the ailing economy of the soviet region during the 1980s

president Mikhail Gorbachev oversaw its process and was in charge to ensure its success in reviving the stagnant economy .

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.