Three distinct monsters threaten the safety and security of each kingdom. What kinds of "monsters" threaten our safety and security? Who do we rely on to protect us?

This question calls for your personal experience and opinion, there is no right or wrong answer. Think in terms of the safety of the country you live in, who protect the country from outside threats and terror? Who is expected to guide these people and lead them in their job of keeping the country secure? You can also take question and apply it to a state, city, or town.... who are our protectors?