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Project Grudge

Reports from Project Grudge and Project Blue Book

Project Grudge was a short-lived project by the U.S. Air Force (USAF) to investigate unidentified flying objects (UFOs). Grudge succeeded Project Sign in February, 1949, and was then followed by Project Blue Book. The project formally ended in December 1949, but continued in a minimal capacity until late 1999.


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Projet Grudge French Projekt Grudge Croatian Progetto Grudge Italian プロジェクト・グラッジ Japanese Project Grudge Polish Projeto Grudge Portuguese Project Grudge Romanian Dự án Grudge VI

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