Question: When the men finally get their shoes, they are just tossed a pair from the wagon and they automatically fit. Were military shoes back then one size fits all? How could they have shoes that automatically fit them?
Chosen answer: The shoes would have been a mix of the most common sizes, and the men would have gone through them to find the right size...swapping when necessary. Keep in mind many of them were barefoot, so even shoes of the wrong size would have been a blessing.
Answer: To add to the answer, it's shown in the film in this scene as a soldier approaches a pile of shoes and places a pair on the pile and grabs another.
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