Information: - 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. - 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. - 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. - 1 Assault Group Royal Marines ( 1AGRM ) provides the Royal Marines expertise and training in small boat operations , both amphibious and riverine . In addition , it trains and parents the Assault Squadrons of the Royal Marines ( ASRM ) and their Landing Craft detachments . It has recently moved from Poole , Dorset to Devonport , Plymouth . - 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. - Landing craft are boats and seagoing vessels used to convey a landing force (infantry and vehicles) from the sea to the shore during an amphibious assault. Most renowned are those used to storm the beaches of Normandy, the Mediterranean, and many Pacific islands during World War II. This was the high point of the landing craft, with a significant number of different designs produced in large quantities by the United Kingdom and United States. - 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. - 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. - 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." After reading the paragraphs above, we are interested in knowing the entity with which '1 assault group royal marines' exhibits the relationship of 'military branch'. Find the answer from the choices below. Choices: - artillery - british army - cavalry - english army - infantry - naval service - navy - new model army - regiment - royal marines - royal navy
A:
naval service