Roberto Eduardo Viola ( October 13 , 1924 -- September 30 , 1994 ) was an Argentine military officer who briefly served as president of Argentina from March 29 to December 11 , 1981 as a military dictatorship .
Roberto Eduardo Viola ( October 13 , 1924 -- September 30 , 1994 ) was an Argentine military officer . He briefly served as president of Argentina from March 29 to December 11 , 1981 as a military dictatorship .