What were some reasons labor unions were formed during industrialization revolution? who did they try to protect

What clause of the treaty of versailles in particular left the germans feeling like they were “stabbed in the back? ” by the victors?

Witch group did the vast majority of the french population belong to

While most people who lived in ancient egypt and the middle east avoided settling in nearby deserts, those regions protected them from their enemies. why do you think this was true?