Which group of muslims conquered the area now known as turkey and expanded into southeastern europe during the middle ages?

Which of the following flow charts accurately illustrates the history of constitutional amendments in the united states?

After world war one, how did the allied countries hope to keep germany from becoming too powerful again?

Why might collective bargaining fail, causing a union to go on strike? a the union agrees with the boss about wages. b the boss compromises about work hours. c the factory goes out of business, causing the workers to lose their jobs. d the boss refuses to address dangerous working conditions in the factories.