He began ruling in <span>2061 </span>BC.
The War of 1812 happened between Great Britain and the United States in 1812. It caused no geographical changes. The main result of the war was two centuries of peace between the United States and Britain. ... The British paid little attention to the war, concentrating instead on their final defeat of Napoleon in 1815.
In Germany, people would refer to it as "Drittes Reich", which is translated in English to "Third Reich" - and I think this is the answer you are looking for, it's very widely used.
Reich means "Empire" , so it could also be translated to the "third empire" but this is not usual.