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On February 9th 1918, violent strikes took place in the main Argentinian cities and army units were rushed to the affected areas after anarchists sabotaged train lines and burnt carriages transporting wheat to Buenos Aires for exportation.<ref>[https://news.google.com/newspapers?id=yQteAAAAIBAJ&sjid=7l8NAAAAIBAJ&pg=3282,3532019&dq=&hl=en Anarchy Reigns in Argentina When General Rail Strike Brings Riots]</ref> Argentinian left-wing activists at the time printed and widely distributed, even among conscripts, a newspaper promoting a Communist Revolution in Argentina.<ref>"Los anarquistas simpatizantes de la Revolución Rusa editaban un periódico para los soldados y hacían un activo trabajo en los cuarteles." El Marxismo y la Revolución Argentina, Tomo II, Otto Vargas, p. 152, Editorial Agora, 1999</ref>According to the Buenos Aires police, the anarchists in 1919 held 203 meetings, and two massive street demonstrations in which 429 key figureheads gave speeches.<ref>The Hispanic American Historical Review, 1946, James Alexander Robertson, p. 49, Board of Editors of the Hispanic American Review, 1946</ref>By the end of 1919, Argentina would witness 367 crippling strikes by some 300,000 workers.<ref>The Intelligence War in Latin America, 1914-1922, Jamie Bisher, p. 254, McFarland, 2016 </ref>

On February 9th 1918, violent strikes took place in the main Argentinian cities and army units were rushed to the affected areas after anarchists sabotaged train lines and burnt carriages transporting wheat to Buenos Aires for exportation.<ref>[https://news.google.com/newspapers?id=yQteAAAAIBAJ&sjid=7l8NAAAAIBAJ&pg=3282,3532019&dq=&hl=en Anarchy Reigns in Argentina When General Rail Strike Brings Riots]</ref> Argentinian left-wing activists at the time printed and widely distributed, even among conscripts, a newspaper promoting a Communist Revolution in Argentina.<ref>"Los anarquistas simpatizantes de la Revolución Rusa editaban un periódico para los soldados y hacían un activo trabajo en los cuarteles." El Marxismo y la Revolución Argentina, Tomo II, Otto Vargas, p. 152, Editorial Agora, 1999</ref>According to the Buenos Aires police, the anarchists in 1919 held 203 meetings, and two massive street demonstrations in which 429 key figureheads gave speeches.<ref>The Hispanic American Historical Review, 1946, James Alexander Robertson, p. 49, Board of Editors of the Hispanic American Review, 1946</ref>By the end of 1919, Argentina would witness 367 crippling strikes by some 300,000 workers.<ref>The Intelligence War in Latin America, 1914-1922, Jamie Bisher, p. 254, McFarland, 2016 </ref>

The first Bolshevik uprising in Argentina took place during the Tragic Week (''Semana Trágica'') in Buenos Aires, which began on January 9th 1919 when striking  metalworkers opened fire on a detachment of the 8th Cavalry Regiment under Captain  Luis A. Cafferata. Shortly later, a group of strikers shoot and kill an Army NCO, Sergeant Ramón Díaz, as he walked down Pueyrredón Street. In nearby Corrientes Street an Argentinian Army platoon commander, Second Lieutenant Agustín Ronzoni and a civilian are also killed by the armed strikers. A rifle platoon under Sergeant Bonifacio Manzo is ambushed and a company of the 7th Infantry Regiment is forced to use Vickers machine-guns to repel the assembled strikers.

The first Bolshevik uprising in Argentina took place during the Tragic Week (''Semana Trágica'') in Buenos Aires, which began on January 9th 1919 when striking  metalworkers opened fire on a detachment of the 8th Cavalry Regiment under Captain  Luis A. Cafferata. Shortly later, a group of strikers shoot and kill an Army NCO, Sergeant Ramón Díaz, as he walked down Pueyrredón Street. In nearby Corrientes Street an Argentinian Army platoon commander, Second Lieutenant Agustín Ronzoni and a civilian are also killed by the armed strikers. A rifle platoon under Sergeant Bonifacio Manzo is ambushed and a company of the 7th Infantry Regiment is forced to use Vickers machine-guns to repel the assembled strikers. Placing the city under martial law, President Hipolito Yrigoyen appointed Army Colonel Luis Dellepiane as the commander of government forces, after which disturbances subsided. The 5th and 12th Army Cavalry Regiments reinforced the Buenos Aires garrison on January 12th, and 300 marines and a mountain artillery regiment are also shipped to Buenos Aires. Nevertheless, on the morning of January 13th 1919, anarchists attempted to seize arms and ammunition from a local police station but were forced to retreat after coming under fire from a naval detachment from the Argentinian Navy cruiser ARA 'San Martin'.

 

The left-wing violence continued throughout the 1920s. On December 24th 1927 two powerful anarchist bombs went off in two US-owned banks in downtown Buenos Aires, killing two employees.<ref>"El 24 de diciembre de 1927 vuelan las casas centrales del Citibank y el Banco de Boston, con el lamentable saldo de dos muertos. Los Mitos de la Historia Argentina: De la ley Sáenz Peña a los Albores del Peronismo ", Tomo III, Felipe Pigna, p. 111, Grupo Editorial Norma, 2006</ref> On May 23rd 1923, the anarchists detonate another bomb inside the Italian consulate in the Argentinian capital, killing 9 and wounding 41, the majority of them Italian-Argentinians.<ref>[https://news.google.com/newspapers?nid=1913&dat=19280523&id=h4EpAAAAIBAJ&sjid=0mYFAAAAIBAJ&pg=3534,4255127&hl=en Nine Killed, 41 Injured By Bomb In Buenos Aires]</ref> On December 24th 1929, Argentinian president Hipólito Yrigoyen narrowly survived an attempt on his life. The would-be assassin, 44 year-old Italian anarchist Gualterio Marinelli is killed by the return fire from the protecting police detachment.<ref>[https://www.diariouno.com.ar/pais/el-atentado-contra-el-presidente-yrigoyen-12242015_BkOGII-GHX El atentado contra el presidente Yrigoyen]</ref>

The left-wing violence continued throughout the 1920s. On December 24th 1927 two powerful anarchist bombs went off in two US-owned banks in downtown Buenos Aires, killing two employees.<ref>"El 24 de diciembre de 1927 vuelan las casas centrales del Citibank y el Banco de Boston, con el lamentable saldo de dos muertos. Los Mitos de la Historia Argentina: De la ley Sáenz Peña a los Albores del Peronismo ", Tomo III, Felipe Pigna, p. 111, Grupo Editorial Norma, 2006</ref> On May 23rd 1923, the anarchists detonate another bomb inside the Italian consulate in the Argentinian capital, killing 9 and wounding 41, the majority of them Italian-Argentinians.<ref>[https://news.google.com/newspapers?nid=1913&dat=19280523&id=h4EpAAAAIBAJ&sjid=0mYFAAAAIBAJ&pg=3534,4255127&hl=en Nine Killed, 41 Injured By Bomb In Buenos Aires]</ref> On December 24th 1929, Argentinian president Hipólito Yrigoyen narrowly survived an attempt on his life. The would-be assassin, 44 year-old Italian anarchist Gualterio Marinelli is killed by the return fire from the protecting police detachment.<ref>[https://www.diariouno.com.ar/pais/el-atentado-contra-el-presidente-yrigoyen-12242015_BkOGII-GHX El atentado contra el presidente Yrigoyen]</ref>