"Napoleon is always right"
This is a form of propaganda. Propaganda is when you have an poster or image and you use it to persuade same one to do something. In this case they want you to come over to the "Aminal Farm". They use Boxer's maxim "Napoleon is always right" to persaude you. Napoleon is like the king so he wants as many people to come as possible to help do the slave like work for him.
Powell, Korbin A. N.p., 8 May 2014. Web. <https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=&url=https%3A%2F%2Fwww.keepcalm-o-matic.co.uk%2Fp%2Fkeep-calm-because-napoleon-is-always-right%2F&ei=5rRMVfKDOsmZNvvAgPgG&bvm=bv.92765956,d.eXY&psig=AFQjCNGq6Vjz4sLQHNkfdKdYUU4qPN1Exw&ust=1431176807233247>.