"I am the Sword of my Family and Shield of my Nation. If sent, I will crush everything you have built, burn all that you love, and kill every one of you" - unknown
If pushed into a corner, it is best that you know yourself and what you will do to defend your nation, your family, your home, etc. Think about it now so that later is is merely a foregone conclusion. To be caught tripping over your thoughts in a crisis has allowed the crisis to win at the very start. Get prepared mentally before you spend time preparing anything else.