János Czetz (June 8, 1822 – September 6, 1904) was a prominent Hungarian freedom fighter of Armenian and Hungarian-Székely origin, a military commander during the Hungarian Revolution of 1848, and the organizer of Argentina's first national military academy.^[1]

From 1870, Cztetz was one of the main organizers and first director of the National Military College, an important contributor to the military government of Argentine president Domingo Faustino Sarmiento. The collaboration helped Argentina become one of the most advanced armies outside of Europe. The strict discipline installed at the College and indirectly in the Army, helped bring an end to the long period of the Argentine civil wars.^{[citation needed]} He published a "Treatise on permanent and temporary fortification".