Original sentence: Britain considered itself as the peacekeeper on the world’s oceans, and the Royal Navy was the instrument by which the Pax Britannica was kept.In the 19th century, Great Britain possessed the largest empire on earth, and to protect that empire and its trade routes Britain also had the largest navy
Edited sentence: Britain took to itself the role of peacekeeper on the world’s oceans, and the Royal Navy was the instrument by which the Pax Britannica was kept.Great Britain possessed the largest empire on earth, and to protect that empire and its trade routes Britain also had the largest navy