Tasked as a Commando light infantry unit, 40 Commando (pronounced "Forty Commando") is capable of a wide range of operational tasks. Personnel regularly deploy outside the United Kingdom on operations or training. Whilst 3 Commando Brigade RM are the principal cold weather warfare formation, personnel are capable of operating in a variety of theatres including tropical jungle, desert or mountainous terrain. The Commando is a regular participant in the annual Brigade cold weather warfare exercise in Norway. The unit's first "winter" was 1991, until which the unit was nicknamed the "Sunshine Commando".