40 Commando

40 Commando Royal Marines
Unit badge
Active	1942–present
Country	United Kingdom
Branch	Royal Marines Naval Service
Type	Commando
Size	One battalion
Part of	3 Commando Brigade
Garrison/HQ	Norton Manor Camp, Taunton, Somerset
Motto(s)	Per Mare Per Terram By Sea By Land (Latin)
March	Quick: "A Life on the Ocean Wave" Slow: "Preobrajensky"
Commanders
Current commander	Lt Col Oliver Denning RM
Captain-General, Royal Marines	King Charles III
Regimental Sergeant Major	WO1 L Drinkwater RM

40 Commando RM is a battalion-sized formation of the British Royal Marines and subordinate unit within 3 Commando Brigade, the principal Commando formation, under the Operational Command of Commander in Chief Fleet. Their barracks are at Norton Manor Camp, Norton Fitzwarren near Taunton in Somerset.

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".

All personnel will have completed the Commando course at the Commando Training Centre (CTCRM) at Lympstone in Devon, entitling them to wear the green beret, with attached personnel having completed the All Arms Commando Course.