A US Navy built to enforce the Monroe Doctrine

How would the US Navy develop if the United States had to enforce the Monroe Doctrine by itself?

It would need many more ships, with the Caribbean becoming the principal naval flashpoint.

The policy becomes materially different once Washington must supply the ships behind its declaration. The assessment expects many more ships of the line and supporting vessels rather than reliance on diplomatic warning alone. European possessions and sea routes in the Caribbean would create the most immediate friction. The segment illustrates how a doctrine's credibility depends on fleet size, basing, and the geography of likely intervention.