The British Empire is the most extensive empire by area. The area of the empire was 35.5 million square kilometers (13.7 million square miles).
British Empire has invaded about 90% of the countries around the earth.
Countries of the world that Britain has not invaded or occupied
The nations never invaded by the British: Andorra, Bolivia, Burundi, Central African Republic, Chad, Congo, Guatemala, Ivory Coast, Kyrgyzstan, Liechtenstein, Luxembourg, Mali, Marshall Islands, Monaco, Mongolia, Paraguay, Sao Tome and Principe, Sweden, Tajikistan, Uzbekistan, Vatican.
Territories that were once part of the British Empire
Countries that gained independence from the United Kingdoms and the years
The British Empire, at its territorial peak (1922), covered nearly the same surface area as the Moon