Vazgen Zaveni Sargsyan (, ; 5 March 1959 – 27 October 1999) was an Armenian military commander and politician. He was the first Defence Minister of Armenia from 1991 to 1992 and then from 1995 to 1999. He served as Armenia's Prime Minister from 11 June 1999 until his assassination on 27 October of that year. He rose to prominence during the mass movement for the unification of Nagorno-Karabakh with Armenia in the late 1980s and led Armenian volunteer groups during the early clashes with Azerbaijani forces. Appointed defence minister by President Levon Ter-Petrosyan soon after Armenia's independence from the Soviet Union in late 1991, Sargsyan became the most prominent commander of Armenian forces during the First Nagorno-Karabakh War. In different positions, he regulated the military operations in the war area until 1994, when a ceasefire was reached ending the war with Armenian forces controlling almost all of Nagorno-Karabakh and seven surrounding districts.