Why did people's attitude change at the end of ww1?

Yes, attitudes changed during WW1. Before men even battled on the battlefield many were patriotic, confident, thought it was a good cause and were confident. However when they were on the battlefield their attitudes changed dramatically. Men were scared and would fear for their lives and many lost loved ones and friends which changed their attitudes towards war.They realised that being part of war is not a thing to be proud of because all it does is kill