This 1942 propaganda cartoon is a parody of "the Three Little Pigs". It takes place during World War II. Adolf Wolf signed a non-aggression Pact with Pigmania so 2 of the Little Pigs think they are safe but Pig number 3 is more intelligent and he is prepared for war !
Remember, in real life, the non-aggression Pact signed in August 1939 between Germany and Russia followed one week later by the invasion of Poland. WW2 then started..