Tacnazo insurrection

El Tacnazo
Part of the Cold War

Regimiento Tacna building in Santiago de Chile.
DateOctober 21, 1969
Location
ActionInsurgents entrench in the Tacna Regiment Building
Result Insurgents give up
Government-Insurgents   
Eduardo Frei Montalva Roberto Viaux
Political support
All parties in Congress of Chile
Military support
Almost all Chilean Armed Forces Tacna Regiment

Tacnazo insurrection (October 21, 1969) (Spanish: El Tacnazo) was a brief revolt of the Tacna artillery regiment, led by General Roberto Viaux, in what turned out to be a non-violent demonstration against the government of Chilean President Eduardo Frei Montalva.