LOPP
Airborne and Antigas Defence League
Polish paramilitary organization
Air and Chemical Defense League (Polish: Liga Obrony Powietrznej i Przeciwgazowej, L.O.P.P.) was a mass Polish paramilitary organization, founded in 1928 as a result of the merger of the State Air Defense League (Polish: Liga Obrony Powietrznej Panstwa) with the Gas Defense Society (Polish: Towarzystwo Obrony Przeciwgazowej). In 1937 it numbered some 1.5 million members, with 14,000 local branches. It had a national character, gathering enthusiasts of aircraft, communications and ballooning. Between 1928 and 1939, its director was general Leon Berbecki