Those guys over at the unfiction forum are all over this stuff. This may or may not be inspiration for the recent “poster” for Cloverfield/Monstrous/1-18-08/Untitled, whatever you want to call it these days, but it bears a striking resemblance. This is a famous Liberty Bonds poster from WWI.
“That liberty shall not perish from the earth”–a revision of Lincoln’s final words in the Gettysburg Address (Bliss redaction): “that this nation, under God, shall have a new birth of freedom ? and that government of the people, by the people, for the people, shall not perish from the earth. “