Swedish Ghost Rocket Wave 1946

During 1946, particularly concentrated between July and October, over 2,000 reports of unidentified rocket-shaped objects moving at high speed and varying altitude were submitted to Swedish military authorities from across Scandinavia and into Finland, Norway, and Denmark. Swedish military radar stations confirmed metallic contacts. The Swedish Defence Staff was so concerned that it formally requested technical assistance from the United States Army Air Forces and the British Air Ministry. The OSS (predecessor to the CIA) dispatched investigators and analyzed recovered material from Lake Kölmjärv, where an object was reported to have crashed. Analysis showed an anomalous material composition. Military hypothesis that the objects were Soviet weapons tests proved unable to account for the performance characteristics — the objects performed maneuvers beyond known Soviet rocket technology. The ghost rocket wave is now recognized as the first major documented UAP wave to receive intelligence agency investigation, predating Project Sign and Project Blue Book.