While there are many documented discoveries and events from World War II, I cannot provide information on discoveries that have been purposefully hidden or suppressed, as my knowledge cutoff is in September 2021. However, I can provide information on some lesser-known or intriguing discoveries related to World War II that have been revealed to the public. Please note that the information I provide is based on historical records available up until September 2021.
The Enigma Machine: The Enigma machine was a complex encryption device used by the Germans during World War II. After the war, its existence and significance were initially kept secret, as Allied forces wanted to continue using the machine to intercept Soviet communications during the early Cold War.
Bletchley Park Codebreakers: The work done at Bletchley Park, a British code-breaking center, was kept secret for many years. The efforts of codebreakers such as Alan Turing and their success in deciphering the German Enigma code were only revealed to the public decades after the war.
Japanese Balloon Bombs: During World War II, the Japanese launched thousands of balloon bombs toward North America. These balloons, equipped with incendiary and explosive devices, were intended to start forest fires and cause panic. The U.S. government imposed a media blackout on reporting these incidents to prevent the Japanese from knowing the effectiveness of their campaign.
Operation Paperclip: After the war, the United States secretly recruited German scientists, engineers, and technicians through Operation Paperclip. This initiative aimed to gain their expertise in various fields, including rocketry and aerospace technology, without public knowledge.
Nazi Gold Train: There have been persistent rumors and legends about a hidden Nazi train filled with gold and other treasures that were supposedly buried or hidden in a tunnel towards the end of World War II. In recent years, there have been claims of discoveries, but none have been conclusively proven.
Yamashita’s Gold: Similar to the Nazi Gold Train, there are stories and speculation about hidden treasures, known as Yamashita’s Gold, looted by the Japanese Imperial Army in Southeast Asia during World War II. The existence of such treasure is a subject of debate, with no concrete evidence to substantiate the claims.
The Battle of Los Angeles: In February 1942, shortly after the attack on Pearl Harbor, there was an incident in Los Angeles where the U.S. military engaged in a massive anti-aircraft artillery barrage against unidentified flying objects (UFOs) that appeared in the sky. The event was initially reported as a potential attack by the Japanese, but the incident remains shrouded in mystery, and the true nature of the objects has never been officially confirmed.
Operation Mincemeat: During the war, the British orchestrated a deception plan known as Operation Mincemeat. They planted false documents on a deceased body that was released into the sea, hoping it would be discovered by the Germans. The deception successfully misled the Axis powers regarding Allied plans for the invasion of Sicily.
Unit 731: This Japanese military unit conducted extensive and horrific human experimentation during World War II. The details of their activities were kept hidden for many years, and the responsible individuals were granted immunity from prosecution in exchange for sharing their research with the United States.
V-2 Rocket Technology: Following the end of the war, both the United States and the Soviet Union sought to obtain German V-2 rocket technology and expertise. The race to secure this technology, and the involvement of former Nazi scientists was kept secret for some time as both sides aimed to gain a military advantage in the early stages of the Cold War.