Original: Oliver Cromwell (born April 25, 1599 Old Style, died September 3, 1658 Old Style) was an English military and political leader best known for his involvement in making England into a republican Commonwealth and for his later role as Lord Protector of England, Scotland, and Ireland.
Simplified: Oliver Cromwell (April 25 1599–September 3 1658) was an English military and political leader best known for making England a republic and leading the Commonwealth of England.