How was propaganda and nationalism used to mobilize the civilian population?

Clarification first: The Propaganda for World War 1 and 2 were for patriotism and motivation to help or to join the military. It was not for nationalism. That is another form of government and political ideology. The propaganda consisted of posters, news paper notices and ads, film clips, and radio messages (oh and magazines too). The topics were "join up", cooperate with the rationing, "be a helper in the war effort", "join the Red Cross", "join and auxiliary group or women join the forces to aid the men on the war front." There were also posters and notices for nurses to join up and help the wounded and sick soldiers, sailors and marines and pilots. There were huge efforts to get people to buy war bonds since they funded the wars. It worked well. They also came up with the idea for the victory gardens to help the ration programs along.