You could go on the internet as search up " WWI propaganda allied poster" and choose one that you like. When you revise the poster, think about modern day topics like Homelessness, Racism, Global Warming, Environment, Violence, change, etc.
For example, I found a picture that says "Save a loaf a week, help win the war"
To change that, I used the topic "Environment"
My twist would be "Save a gallon of water, help the ones in need"
Hopefully that gave you an idea, if you need further assistance, you can message me!
