The 'battle for births' refers to a campaign initiated by Mussolini’s regime in Italy during the 1920s and 1930s aimed at increasing the birth rate in the country. This campaign was driven by fascist ideology that emphasized the importance of population growth for national strength and military power. The regime promoted traditional family values, incentivized childbirth through financial benefits, and even introduced propaganda to encourage women to focus on motherhood as their primary role in society.