Q:Information: - Light infantry (or skirmishers) are soldiers whose job was to provide a skirmishing screen ahead of the main body of infantry, harassing and delaying the enemy advance. Light infantry was distinct from medium, heavy or line infantry. Heavy infantry were dedicated primarily to fighting in tight formations that were the core of large battles. Light infantry fought in open-order, often in close co-ordination with heavy infantry, where they could screen the heavy infantry from harassing fire, and the heavy infantry could intervene to protect the light infantry from attacks of enemy heavy infantry or cavalry. Heavy infantry originally had heavier arms and more armour than light infantry, but this distinction was lost as the use of armour declined and gunpowder weapons became standardized. - Parachuting, or skydiving, is a method of transiting from a high point to Earth with the aid of gravity, involving the control of speed during the descent with the use of a parachute. It may involve more or less free-fall, a time during which the parachute has not been deployed and the body gradually accelerates to terminal velocity. - The Corps of Royal Marines (RM) is the United Kingdom's amphibious light infantry force, forming part of the Naval Service, along with the Royal Navy. The Royal Marines were formed in 1755 as the Royal Navy's infantry troops. However, the marines can trace their origins back to the formation of the English Army's "Duke of York and Albany's maritime regiment of Foot" at the grounds of the Honourable Artillery Company on 28 October 1664. - The Honourable Artillery Company (HAC) was incorporated by Royal Charter in 1537 by King Henry VIII and is considered one of the oldest military organisations in the world. Today it is a registered charity whose purpose is to attend to the "better defence of the realm", this purpose is primarily achieved by the support of the HAC Regiment and a detachment of Special Constabulary to the City of London Police. The word "artillery" in "Honourable Artillery Company" does not have the current meaning that is generally associated with it, but dates from a time when in the English language that word meant any projectile, including for example arrows shot from a bow. The equivalent form of words in modern English would be either "Honourable Infantry Company" or "Honourable Military Company." - An abseil (or ), also called a rappel after its French name, is a controlled descent of a vertical drop, such as a rock face, using a rope. - The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a sovereign country in western Europe. Lying off the north-western coast of the European mainland, it includes the island of Great Britain (the name of which is also loosely applied to the whole country), the north-eastern part of the island of Ireland, and many smaller islands. Northern Ireland is the only part of the UK that shares a land border with another sovereign statethe Republic of Ireland. Apart from this land border, the UK is surrounded by the Atlantic Ocean, with the North Sea to its east, the English Channel to its south and the Celtic Sea to its south-south-west, giving it the 12th-longest coastline in the world. The Irish Sea lies between Great Britain and Ireland. With an area of , the UK is the 78th-largest sovereign state in the world and the 11th-largest in Europe. It is also the 21st-most populous country, with an estimated 65.1 million inhabitants. Together, this makes it the fourth most densely populated country in the European Union. - The English Army existed while England was an independent state and was at war with other states, but it was not until the Interregnum and the New Model Army (raised by Parliament to defeat the Royalists in the English Civil War) that England acquired a peacetime professional standing army. At the restoration of the monarchy, Charles II kept a small standing army, formed from elements of the Royalist army in exile and elements of the New Model Army, from which the most senior regular regiments of today's British Army can trace their antecedence. Likewise, Royal Marines can trace their origins back to the formation of the English Army's "Duke of York and Albany's maritime regiment of Foot" at the grounds of the Honourable Artillery Company on 28 October 1664. - 3 Commando Brigade is a commando formation of the British Armed Forces and the main manoeuvre formation of the Royal Marines. Its personnel are predominantly Royal Marines, supported by units of Royal Engineers, Royal Artillery, and the Fleet Air Arm, together with other Commando Qualified sailors, soldiers and airmen. - A soldier is one who fights as part of an organised, land-based armed force. A soldier can be an enlisted person, a non-commissioned officer, or an officer. - The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by the English kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years War against the kingdom of France. The modern Royal Navy traces its origins to the early 16th century; the oldest of the UK's armed services, it is known as the Senior Service. - The Royal Regiment of Artillery, commonly referred to as the Royal Artillery (RA), is the artillery arm of the British Army. Despite its name, it comprises a number of regiments. - Special operations (S.O.) are military operations that are "special" or unconventional and carried out by dedicated special forces and other special operations forces units using unconventional methods and resources. Special operations may be performed independently of or in conjunction with, conventional military operations. The primary goal is to achieve a political or military objective where a conventional force requirement does not exist or might adversely affect the overall strategic outcome. Special operations are usually conducted in a low-profile manner that aims to achieve the advantages of speed, surprise, and violence of action against an unsuspecting target. Special ops are typically carried out with limited numbers of highly trained personnel that are adaptable, self-reliant and able to operate in all environments, and able to use unconventional combat skills and equipment. Special operations are usually implemented through specific, tailored intelligence. - A battalion is a military unit. The use of the term "battalion" varies by nationality and branch of service. Typically a battalion consists of 300 to 800 soldiers and is divided into a number of companies. A battalion is typically commanded by a lieutenant colonel. In some countries the word "battalion" is associated with the infantry. - 45 Commando Royal Marines ( pronounced '' four - five commando '' ) is a battalion sized unit of the British Royal Marines and subordinate unit within 3 Commando Brigade Royal Marines , the principal Commando formation , under the Operational Command of Commander in Chief Fleet . Tasked as a Commando amphibious unit , 45 Cdo RM is capable of a wide range of operational tasks . Based at RM Condor , their barracks in Arbroath , personnel regularly deploy outside the United Kingdom on operations or training . While 3 Cdo Bde 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 , having been the first UK unit to specialise in the mountain and Arctic warfare role during the early 1970s and deployed to Norway on NATO 's northern flank most years until the end of the Cold War . All personnel 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 . - The Corps of Royal Engineers, usually just called the Royal Engineers (RE), and commonly known as the "Sappers", is one of the corps of the British Army. It is highly regarded throughout the military, and especially the Army. - The Fleet Air Arm (FAA) is the branch of the British Royal Navy responsible for the operation of naval aircraft. The Fleet Air Arm currently operates the AgustaWestland Merlin, Westland Sea King, AgustaWestland Wildcat and Westland Lynx helicopters and the BAE Hawk. Helicopters such as the Lynx and Westland Wasp have been deployed on smaller vessels since 1964, taking over the roles once performed by biplanes such as the Fairey Swordfish. - The British Armed Forces form the military of the United Kingdom, tasked with defence of the country, its overseas territories, and the Crown dependencies. They also promote the UK's wider interests, support international peacekeeping efforts, and provide humanitarian aid. - Infantry is the general branch of an army that engages in military combat on foot. As the troops who engage with the enemy in close-ranged combat, infantry units bear the largest brunt of warfare and typically suffer the greatest number of casualties during a military campaign. Historically, as the oldest branch of the combat arms, the infantry are the tip of the spear of a modern army, and continually undergo training that is typically more physically demanding and psychologically stressful than that of any other branch of the combat arms. Common representations of infantry fighting forces include the U.S. Army Infantry Branch, U.S. Marine Corps Infantry, Royal Canadian Infantry Corps, Infantry of the British Army, and the Royal Australian Corps of Infantry. - A commando is a soldier or operative of an elite light infantry or special operations force often specializing in amphibious landings, parachuting or abseiling. - A lieutenant (abbreviated Lt., LT, LTA, Lieut., LEUT and LEUT.) is a junior commissioned officer in many nations' armed forces, fire service or police. - A troop is a military sub-subunit, originally a small formation of cavalry, subordinate to a squadron. In many armies a troop is the equivalent element to the infantry section or platoon. Exceptions are the Royal Horse Artillery and the US Cavalry, where troops are subunits that compare to an infantry company or artillery battery. What object entity has the relation of 'part of' with the subject '45 commando'? Choices: - 3 commando brigade - arm - armed forces - army - artillery - atlantic ocean - back - battalion - body - bow - british armed forces - british army - cavalry - charity - city - company - country - crown - earth - england - english - english civil war - equipment - european union - face - fire - foot - french - horse - ireland - islands - may - medium - military - name - naval service - north sea - october - order - part - person - platoon - police - rock - royal artillery - royal engineers - royal marines - royal navy - training - warfare
A:
naval service