This is a World War 2 poster from 1943 and i found it here on the V&A websitehttp://collections.vam.ac.uk/item/O101112/food-is-a-weapon-poster-us-office-of/
This poster shows an empty plate with a chicken and wish bone on with a knife and plate.  By the side is an empty glass and the other a screwed up napkin.  All of these things suggest that the meal was consumed by someone very grateful as nothing was left behind.  The plate is deliberately the same colour as the type to resemble the same thing.  The screwed up napkin suggests that the meal is completely finished.  The background is a mixture of greens and yellow and a water colour base and gets lighter towards the middle.  It does this because it's trying to make the plate stand out against the dark background.  The text 'Food Is a Weapon' is associating one thing with another which is completely different.  I think that it's trying to say that food like this is hard to come by so make good use of it when it comes to you.  'Don't Waste it!' is fairly straight forward.  Telling the viewer simply to eat every part.  It's very direct to the viewer and gets the message across simply and effectively in 3 words.  Underneath that is read 'Buy wisely - Cook Carefully- Eat it All'.  I think this poster is describing it in 3 steps from buying the food and consuming it.  You're eyes are drawn towards this text even though it may be a lot smaller, but after reading 'don't waste it' you're eyes are taken downwards.  At the bottom of the poster is 'Follow The National Wartime Nutrition Program'.  I feel that is text is small as it isn't the main message of the poster therefore not as important.  It is light green to relate the Nutrition Program it's saying to follow.  Overall the poster's message is talking as if food is like diamonds, a prised possession in the war and this why i like it.  It's very direct and also true.  I can also relate to this poster too.