This line implies Great Britain and the British Empire by using the term "Britannia".
The Empire is old as insinuated by the words "drooping" head.
Addressing this to Washington is showing the general that the nation of Britain, and it's empire is old...
The next lines show that it is responsible for a lot of death and destruction.
<span>D. The phrase "wretched creatures" reveals that Crusoe is preoccupied with mastery. In the story, Crusoe was a slave trader shipwrecked on an island and so at first looked down on the "savages" but with time began to re-consider his attitude to the inhabitants of the island and to slave trading.</span>