 In December 1975, Montoneros raided an armaments factory in the capital's Munro neighbourhood, fleeing with 250 assault rifles and sub-machine guns.That same month, a Montoneros bomb exploded at the headquarters of the Argentine army in Buenos Aires, injuring at least six soldiers.By the end of 1975, a total of 137 army officers, NCOs and conscripts and policemen had been killed that year and approximately 3,000 wounded by left wing terrorism.