(Click image to watch. Thanks to MAXIMUM GAME PLUS for posting.)
Again I'll post DUCK BRIGADE, also by Mitsuyo Seo from 1940. Anti-war ending in this cartoon in the American style. A year later, forget it. Soon, Mitsuyo Seo would be directing his infamous Momotaro propaganda features.
(Click image to watch. Thanks to VULTURE GRAFFIX for posting.)