Children's Death Educational Film

There is a lost WW2 animated educational film about death that's aimed towards children in the early 1940's that was commissioned by the US government to make children not to fear death especially in front of an enemy or in the front lines of the war and the details of the animated film as follows: it had a Looney Tunes setting with a dark comedic happy tree friends vibes to it and there was a Elmer fudd look-a-like soldier with a rifle to get revenge of a fallen soldier he personally knew with dark comedic slapstick ensues and at the end he kills the enemy in a realistically animated fashioned which is considered today's standard a snuff film.