2017Evocation of Portuguese Participation in World War I - First Day Cover

World War I found Portugal in the process of changing from its centuries-old political system – Monarchy – to a Republic.
This transition was not peaceful, despite popular acceptance of the new system. The partisan violence that broke out exceeded all expectations, leading the country into a situation that modern historians describe as “intermittent civil war,” even creating divisions at the heart of the Armed Forces, which themselves became politicised.