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.
British WWI poster - Irishmen, even though you hate the English like sin, look, your ship sank, come fight for us!
William T. Shorey (1859 – 1919) was a late 19th Century American whaling ship captain known to his crew as the Black Ahab. He was born in Barbados July 13, 1859 and spent his life at sea. He became the only black captain operating on the west coast of the United States in the late-1880s and 1890s. He obtained his certification in 1885. Black history album