Winston Churchill (1874-1965) was a British politician known chiefly for his leadership of the United Kingdom during World War II. Churchill was also an officer in the British Army, a historian, a Nobel Prize-winning writer, and an artist.
In 2006, the Atlantis expedition was tricked into forming an alliance with a Wraith, who later sent two Hive ships to attack Earth. When Dr. Elizabeth Weir blamed herself for the events that took place, Major General Henry Landry told her the above quote from Churchill to make her feel better. (SGA: "No Man's Land")