Or by possessing a powerful navy, fundamentally eliminate the possibility of an enemy landing on one's territory.
As long as the coast of the United States is not threatened, the mainland of the United States will not be threatened.
Currently, the situation in Europe has clearly been leaning towards the Allies, something the Americans are somewhat reluctant to witness.
If the Germans are defeated, the most threatening country to the British Empire would be the Americans themselves.
By that time, the seemingly very secure geographical location in the United States would not hold up against the naval blockade of the Four Great Powers of the Allies.
Rapidly enhancing the strength of the navy and enabling the US Navy to protect its coastline is the pressing task for the United States at the moment.
