Final answer:
The best defense against subversion at home is the loyalty of the American people.
Step-by-step explanation:
The best defense against subversion at home is the loyalty of the American people. Subversion refers to attempts to undermine or overthrow the government or social order. While our military is prepared to deal with external aggression, it is the loyalty and support of the American people that serves as the strongest defense against subversive acts within the country.