As a general rule, as with everything that is a “sensitive subject”, concealed carry requires a lot of common sense, a proper mindset and a carrying etiquette.
Martial law is the imposition of direct military control of normal civilian functions by a government, as a response to a temporary emergency such as invasion.
Most people who carry a concealed weapon never encounter a dangerous situation that warrants its use. But you always need to be ready for such a situation.