Going AWOL During World War I (WWI) c. 1919 : Don't leave until Uncle Sam says so

Charles R. Bowers (June 7, 1889 – November 26, 1946) was an American cartoonist and slapstick comedian during the silent film and early "talkie" era. He was forgotten for decades and his name was notably absent from most histories of the Silent Era, although his work was enthusiastically reviewed by André Breton and a number of his contemporaries. As his surviving films have an inventiveness and surrealism which give them a freshness appealing to modern audiences, after his rediscovery his work has sometimes been placed in the "top tier" of silent film accomplishments (along with those of, for example, Charlie Chaplin, Buster Keaton, Harold Lloyd). In comic style, he probably modelled himself after both Harry Langdon and Buster Keaton and was known to the French as "Bricolo."

https://en.wikipedia.org/wiki/Charles_Bowers

This is an animation from 1919 about the dangers of going Absent Without Leave after the World War I Armistice was signed.

https://en.wikipedia.org/wiki/Armistice_of_11_November_1918