Ireland gained independence from England on December 6, 1921. That day signifies a 5-year struggle to gain independence from the British Empire.
Britain ruled Ireland since the 12th century. The Irish Catholics rebelled numerous times to no avail. Several times throughout history, the Irish people suffered through such rebellions, and were forced to eat nothing but potatoes. During the 1840s, a potato blight hit the country which caused one million people to die and two million more to flee to the United States.
The movement for Irish independence gained strength in the late 19th century and by 1921, the country had gained independence.