Chris Meddings and his stunning take on the first snow at an unknown airfield WW1 Nieuport XVII the ride of Captain Matton who had just come back from a sortie and was asked to go back to his plane for a photograph. France, ever the trendsetter in fashion, established a principle that was followed to various degrees by its allies, especially the Americans.
This is partial text from the full article (usually with photos) at https://aeroscale.net/news/nieuport-xvii-the-ride-of-captain-matton