Books written by Laura Ingalls Wilder served as the inspiration for propaganda used during World War II.
It’s conceivable that you’ve noted that the publication of the Little House books occurred about the same time as the Second World War broke out in the preceding paragraph. After the series was completed in 1943, the post-war occupation headquarters under the command of General Douglas MacArthur chose Ingalls Wilder’s novel The Long Winter as one of the first American works to be translated into Japanese. General Douglas MacArthur made this decision.
Even if that wasn’t what Laura had in mind when she was writing these books, it is abundantly evident that someone else did see something in them that was useful to the war effort.