In the previous article, we explored the world of World War I aero stamps. This time, we turn to some of the most fascinating airmail stories of World War II - focusing on one of the deadliest and most challenging wartime routes of all, the legendary Hump Route.
The rapid development of aviation between the two world wars meant that airmail played a far greater role in WWII than it ever had in WWI. Both the Allies and the Axis Powers relied heavily on aircraft not only for urgent military communication, but also for delivering personal letters to and from the front lines. Wartime airmail became a lifeline for millions of soldiers and families separated by continents and oceans.
Many nations used airmail during the conflict, but a few relied on it on a particularly large scale. The United States led the effort with its widespread Transport Airmail network (1941–44), the reduced-rate Armed Forces airmail service, and long-distance routes across the Atlantic, Pacific, and the China–Burma–India theater - including the hazardous flights over the Hump.
Twin-Motored Transport Plane (FDC)
USA - 1941
The United Kingdom and its Commonwealth partners also maintained a remarkable airmail system operated by BOAC (British Overseas Airways Corporation), from transatlantic connections to the famous Horseshoe Route that kept the Empire linked when the Mediterranean became too dangerous to cross.
King George VI 6d Air Letter (Aerogramme)
UK - 1944
Germany developed one of the most extensive military postal systems of the war, using Feldpost and Luftfeldpost to supply and communicate with front-line units across occupied Europe and North Africa.
“Luftfeldpost” Military Airmail Stamp
Germany - 1942
Japan created a similarly large network across East and Southeast Asia, supported by Imperial Army and Navy routes as well as occupation-issued airmail stamps. Italy, active in the Mediterranean and North Africa, relied on its own mix of colonial overprints and military airmail channels. Together, these countries operated some of the most complex and historically rich airmail systems ever seen in wartime.
“Passenger Plane over Lake Ashi” Airmail
Japan - 1929
The Hump Route was one of the most dangerous aviation paths of World War II, crossing the towering Himalayan mountains between India and China. After Japanese forces cut off traditional supply routes, this air corridor became the only means of delivering mail, supplies, and essential communication to the Chinese war effort. Pilots had to navigate extreme altitudes, sudden storms, unpredictable winds, and some of the world’s harshest terrain.
Navigation equipment was limited, and flights were often made in poor visibility, which led to frequent and tragic crashes. Despite these challenges, thousands of letters and vital dispatches still made the perilous journey over the mountains. Today, Hump Route covers are considered some of the most dramatic and historically significant items in WWII aero-philately.
The Flying Tigers - officially known as the American Volunteer Group (AVG) - played a key role in protecting aircraft and mail flying across the Himalayas during the early years of WWII. Even before the United States formally entered the war, these volunteer pilots were risking their lives to support China by escorting transport planes and defending critical airfields.
Claire Lee Chennault/Flying Tigers FDC
USA - 1990
Their shark-toothed P-40 fighter planes became iconic symbols of determination and courage. Alongside their combat missions, the Flying Tigers helped safeguard airmail flights that carried strategic military messages as well as personal letters between China and Allied bases. Their presence greatly improved the survival rate of the transport planes attempting the treacherous Hump crossing. For collectors today, any postal item connected to the Flying Tigers is considered a rare and highly prized piece of wartime aviation history.
Today we explored several interesting WWII and WWII-related airmail stamps, and we also touched on the stories of the Flying Tigers and the Hump Route. While you wait for the next article, feel free to browse some of the similar articles below.
World War I Aero Stamps
History and Philately: World War II: Battle of Stalingrad
History and Philately - World War II: Summer of 1939
History and Philately: Christmas Truce of 1914
Philately and History: WWI on Stamps
