How was propaganda used to influence the people during world war 1?

how they got people to join the army was mainly force and peer pressure and sometimes if you did not go to war you would be sent a white feather naming you a coward and i think you would have to be a brave person not to go because a lot of people especially old ladies who sons were lost in the war would mock you if you didn't have a good reason not to go to war.(tho some people were given the option war or prison)