|Fish and Vegetable Meals, vintage poster image courtesy of Wikicommons|
Here's a good one. It dates from WWI, and comes from Canada (those Canadians know how to eat, ha). This one urged civilians at home to eat more fish and vegetables so that the wheat, meat and fats would be saved for the soldiers and allies overseas.
This one is interesting though because it looks like it could easily be a healthy eating poster today. Eating more fish and vegetables and eating less wheat, meat, and fats would be a good thing.
More later today and I'll catch up on comment replies.