British WWI poster - Irishmen, even though you hate the English like sin, look, your ship sank, come fight for us!
US WW I propaganda - the word on the club is Kultur. This refers to Kulturkampf (culture war) in founding the 2nd Reich: Prussia forcibly unified independent German states into one nation by forcing everyone to speak Prussian and by outlawing Catholicism, among other things. Many Germans emigrated to the US after having been violently repressed and sometimes losing everything they owned. I'm thinking one of these people could have designed this poster.