Answer:
The Primary motivation is towards political and commercial. The purpose of this poster is because it is asking the public to join the marines its also tries to give a sense of pride and when you join you are 'wearing the colors' of that sense of pride.
Explanation: this is the paragraph:
Because WWI just started the US millitary is looking for people to join. They used posters and propaganda like this to awaken the American pride at sending their boys overseas to fight. Propaganda's primary motivation was political and commercial. This was a good technque in getting people to feel a certain way for something. weather that be war, gardens (WWII Victory gardens), and other political figures at that time.
