Goofs

When Ollie flings a teapot of boiling water on Uncle Jack a few pieces of dry ice fall out revealing that the steam was the result of placing dry ice in the water.

Stan and Ollie are sitting on a bench, Stan gets up causing the bench to tilt up knocking the cook, George Marshall, unconscious. George's hat falls off as he falls but in another shot he'd still got it on.

When Stan & Ollie try to get a loan Ollie's trousers are ripped on his behind. But afterwards when they run home the trousers are intact.

Whilst in the apartment, Stan looks at a newspaper article referencing the Empire State Building in New York. The Empire State Building wasn't built until 1931, but Stan and Ollie supposedly had just returned from the Great War, meaning the year should have been 1918 or 1919 and the Empire State Building was not yet built.

At the beginning of the movie Hardy indicates how much he wishes he could go to war but when the recruiting sergeant shows up Hardy quickly walks away with Laurel in an effort to elude him.

However, this is not a plot-hole as this is literally the joke.

Director George Marshall, playing the fearsome army chef, wears civilian dress slacks behind his apron. That's because the actor assigned to the part no-showed and Marshall literally stepped in for him at the last minute.

When Ollie flings a teapot of boiling water on Uncle Jack a few pieces of dry ice fall out revealing that the steam was the result of placing dry ice in the water.

While Ollie is in the kitchen, the teapot and kettle on the stove has steam going down, indicating that it's not boiling water, but rather dry ice used for the effect.

At the beginning of the movie when the newsboy is selling papers announcing war has been declared, it's supposed to be April, 1917, but all the women in the scene are wearing cloche hats and short 1930 skirts. When L&H are sitting on the park bench, all the women in the background are dressed appropriately for 1917; in later sequences, supposedly taking place in 1919-1920, all the women are dressed in typical 1932 clothing, and some of the automobiles are also of the later era.

Banker Smith's office is in the typical 1932 art-deco style, which had not yet come into vogue at the time the scene is supposedly taking place, circa 1920.

As L & H head up the steps of their flat after "borrowing" money from the bank, the boom mic shadow can clearly be seen following them up and down the stairs.