Unsuccessful attempts were made to implement reforms and adopt a constitution during the 1960s and 1970s. An economic crisis at the end of the 1980s led to a popular movement that brought about parliamentary elections and the adoption of a constitutional monarchy in 1990. The 1990s saw the beginning of the Nepalese Civil War (1996–2006), a conflict between government forces and the insurgent forces of the Communist Party of Nepal (Maoist). The situation for the Nepalese monarchy was further destabilised by 2001 Nepalese royal massacre.