The Marzo paraguayo ("Paraguayan March") was a political crisis that occurred in Paraguay because of the assassination of the then-Vice President Luis María Argaña on 23 March 1999. The opposition blamed the then-President, Raúl Cubas Grau, and also the strongman of Paraguayan politics of that time, Lino Oviedo, for the assassination. Argaña's assassination provoked a series of demonstrations by opponents and supporters to Oviedo and the Cubas government, which culminated in clashes in which seven demonstrators opposed to the government died, which resulted in the resignation of Cubas from the presidency.