The United States' resources made it difficult to blockade into starvation, but naval warfare remained relevant. The relatively small 1920s American submarine and cruiser forces or attempts to incite colonial rebellion were unlikely to break the British Empire quickly. A large share of American internal goods movement still traveled by sea along the coasts. Commerce raiding could therefore disrupt domestic distribution even when the country possessed the food, fuel, industry, and raw materials it needed.
Notable Point · 1:22:55-1:23:48
American coastal shipping remained a maritime vulnerability
Continental self-sufficiency did not remove the exposure created by moving domestic goods along the coast.