Sky Couriers

The year is 1945.
The world is still at war. Nations clash across land, sea, and air-yet amid the thunder of engines and the smoke of battle, a fragile peace moves between the clouds.

Formed by the newly established Treaty Council, the Treaty of Postal Air Services (TPAS) allows neutral flying boats from all nations to deliver letters, medicine, and supplies across front lines.
The Sky Couriers pilots, engineers, and radio operators brave both weather and warfare to keep the world connected.

Each nation flies its own courier fleet:

Britannia's Sky Post - red-and-gold Sunderlands, precise and proud.

The Soviet Courier Corps - great silver Berievs, singing through snowstorms.

The US Coastal Express - bright Catalinas with pinup nose art and booming laughter.

France's Les Colombes Bleues (Blue Doves) - elegant Amphitrites with artistic grace.

Japan's Treaty Postal Authority - operating from the Yonaguni Seabase, youngest of all, flying turquoise Kawanishi H8K-3P "Sea Lilies" crewed by five spirited girls who deliver hope where peace cannot reach.

Their flights cross every ocean and border, marked only by the silver wings of neutrality-a small envelope and the promise it carries.
They are not soldiers. They do not take sides. Yet every letter they deliver holds a piece of the world's heart.

Through storms, silence, and gunfire, these couriers remind humanity of what still matters most:
connection, compassion, and the belief that words can outfly war itself.

"Even when the world is divided, the mail must go through."