Complex sentence: After the armistice, Visconti continued to fly with the newly formed "Aviazione della Republicca Sociale Italiana" (ARSI) of the deposed Benito Mussolini, and shortly thereafter, he was promoted to captain, commanding 1 Squadron, 1 Gruppo Caccia.
Split into simpler sentences: After the armistice, Visconti continued to fly with the newly fomed Aviazione della Republicca Sociale Italiana of the deposed Benito Mussolini. Shortly after its formation, he was promoted to captain, commanding 1 Squadron, 1 Gruppo Caccia.