Declared War on Germany
When the United Kingdom declared war on Germany on September 3, 1939, Ireland, despite being still technically a dominion of the United Kingdom, elected to stay out of the war, choosing instead to remain neutral, the only member of the British Commonwealth to do so. Neutrality offered both advantages and challenges, and the choice is still controversial today. The History Guy recalls the unique position of Ireland during the Second World War.
Credit to : The History Guy: History Deserves to Be Remembered