Complex sentence: During the Fascist regime of Italy, which began in 1924, the arms were augmented with symbols of the new government: a red chief was added in 1926, which was charged with fasces and laurel wreath.
Split into simpler sentences: During the Fascist regime of Italy, which began in 1924, the arms were augmented with symbols of the new government. A red chief was added, which was charged with fasces and laurel wreath.