I like this one, if your man does not sign up for WW1 is he right for you? likely to neglect you as he did his country? Very much the duty of ALL men to sign up and fight the enemy.
This poster gives the real impression that signing up can be a man real prospects in life. Unskilled or not there was a place for you.
There were a number of WW1 posters referring to "Remember Belgium". At the start of WW1 Germany invaded Belgium with such brutality to civilians it was used as a tool across Europe to sign people up against the enemy for a number of years following the event.