TIL about vmail and airgraph

I was watching a Pat Loller — who, let me just say, models a left wing version of patriotism that I absolutely find great delight in — TikTok about vmail and airgraph.

Here’s the Pat Loller TikTok:

https://www.tiktok.com/t/ZT8HR8uAj/

And a couple articles about vmail and airgraph:

https://www.nationalww2museum.org/war/articles/mail-call-v-mail

https://postalmuseum.si.edu/exhibition/victory-mail-introducing-v-mail/microfilm-models-precursors-of-v-mail

I did not know about either of these and was super excited to learn about both, and the airgraph predecessor involving carrier pigeons in the Paris siege of 1870.