Airborne and Antigas Defence League
（重定向自LOPP）
Air and Chemical Defense League (Polish: Liga Obrony Powietrznej i Przeciwgazowej, L.O.P.P.) was a mass Polish paramilitary organization, founded in 1928 and based on the previous organization, Air Defense League of the Country (Polish: Liga Obrony Powietrznej Panstwa). In 1937 it numbered some 1.5 mln 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