Because at that time, The pathway to Lusittiana was a territory conquered by the Germans troop during their conflict with Great Britain in World War I.
The Germans give the warning following the international law of warfare at that time that indicates each nations should give warning to normal civilians if they intended to target a certain area.
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.
B. in the late eighteenth century
I think it’s B I hope this helps
