What are some of the things that Paul learns about war throughout the movie?

Both movies reflect the book pretty well. Paul essentially learns that war is a literal and figurative hell. Lives are lost and the few who make it out alive are emotionally and often physically ruined. Germany sends out virgins with rifles only to get slaughtered and destroy their innocence. Paul learns that his comrades are his only family and the war becomes his life. Despite his Kantorek's rousing speeches in school, Paul learns that there is nothing patriotic or glamorous about war: there is only survival or death.