Explain what propaganda is and then give the main reason why the world war 2 poster below could be considered propaganda

Its an petition to all civilian to go to war

there are the initial camera costs, with each camera running about $1,000, but the storage costs are where the real expense comes in. according to a recent time article online, nearly a third of the 18,000 state and local police departments in the u.s. are purchasing body-cameras for their officers.