Following the Risorgimento, when Italy was transformed from a geographical place to a political entity, a degree of nationalism was generated. Not to be outdone by the French, some huge paintings were commissioned that commemorated battles of the Italian unification effort and subsequent conflicts. A few of these can be seen in Rome's Galleria Nazionale d'Arte Moderna (Web site here).
I visited the Arte Moderna recently and took some photos of huge war paintings by Giovanni Fattori (1825-1908) and Michele Cammarano (1835-1920). I included a bit of the surroundings so that you might get a sense of the scale of these works. Click on the images to enlarge.