Wikipedia's Kamayan article describes the boodle fight as a tradition of the Armed Forces of the Philippines, originally practiced by Philippine Military Academy cadets and named for military slang from the United States Military Academy West Point, but names no year, decade or bounding period for when PMA cadets began the practice. A search of further secondary accounts found the same description with no added date.
What would resolve this A Philippine Military Academy institutional history, a military historian's account, or a dated news reference naming when cadets began this specific communal eating custom.
OpenMilitary and food historyBoodle fight (Wikipedia)