JHA archive - EU Justice and Home AffairsDouments from 1976 onwards. The archive covers the ‘TREVI’ Group on “Terrorism, Radicalisation and Extremist Violence”, established by the governments of the then six EEC member states in 1976, the period of “European Political Cooperation” during the 1980s, and the negotiations leading up to the Schengen and Maastricht Treaty frameworks, which set the parameters for justice and home affairs cooperation throughout the 1990s (from website).