Artist who once ran a 'War Is Over!' poster campaign

Let's find possible answers to "Artist who once ran a 'War Is Over!' poster campaign" crossword clue. First of all, we will look for a few extra hints for this entry: Artist who once ran a 'War Is Over!' poster campaign. Finally, we will solve this crossword puzzle clue and get the correct word. We have 1 possible solution for this clue in our database.