Who, me? Yes, you. With a stern look and bony finger pointing out, this embodiment of America pushed all young men to enlist for their moral responsibility. Of all WW2 propaganda posters with explanation, Uncle Sam certainly sticks out as one of the most famous. Actually, this “I Want YOU” poster was first published in 1916 for World War 1 recruiting efforts. The poster proved to be so popular, that the U.S. Army revamped it and pushed it out again for the Second World War.