Another World War I era cartoon, this also features Kaiser Wilhelm perched atop a German U-Boat, the first viable submarine used in naval warfare (there were other submarines before World War I, as we know, but those unfortunately ended up on the bottom with their occupants quite dead). This article was posted after the Lusitania incident and in response to American outrage over the sinking of a passenger ship (although it was transporting weapons to our allies in Europe). The four ships represent the issues that Americans were most angry about during this point in time. Many Americans saw this as a blatant challenge to our growing nation.