Question: When did the military branch Vernon Erskine-Crum served in start wearing khaki?

full_context: Document 1: Hamish Forbes: Major Sir Hamish Stewart Forbes, 7th Baronet, MBE, MC, KStJ (15 February 1916 – 3 September 2007) was a British Army officer who served in the Welsh Guards in the Second World War, spending over 5 years in German custody as a prisoner of war. In later life, he was patron of the Lonach Highland and Friendly Society from 1984 until his death.
Document 2: The Troubles: The Troubles (Irish: Na Trioblóidí) was an ethno - nationalist conflict in Northern Ireland during the late 20th century. Also known internationally as the Northern Ireland conflict, and the Conflict in Ireland it is sometimes described as a ``guerrilla war ''or a`` low - level war''. The conflict began in the late 1960s and is usually deemed to have ended with the Good Friday Agreement of 1998. Although the Troubles primarily took place in Northern Ireland, at times the violence spilled over into parts of the Republic of Ireland, England, and mainland Europe.
Document 3: Uniforms of the United States Navy: The Navy first authorized a khaki uniform in 1913 as a practical garment for early naval aviators; they were given permission to wear Marine Corps khaki uniforms with naval insignia, when flying or working on aircraft. Khakis were authorized aboard submarines in 1931 and as a working uniform on all ships ten years later.
Document 4: Charles McCrum: Charles McCrum (born 8 December 1964 in Belfast, Northern Ireland) is an Irish former cricketer. A right-handed batsman and right-arm medium pace bowler, he played 22 times for the Ireland cricket team between 1990 and 1994 including one first-class match against Scotland and two List A matches in the NatWest Trophy. His brother Paul has also played cricket for Ireland.
Document 5: Vernon Erskine-Crum: Lieutenant-General Vernon Forbes Erskine-Crum, CIE, MC (11 December 1918 – 17 March 1971) was a British Army officer, who briefly served as General Officer Commanding in Northern Ireland during the early period of the Troubles.
Document 6: Bermuda: Bermudians served in the British armed forces during both World War I and World War II. After the latter, Major-General Glyn Charles Anglim Gilbert, Bermuda's highest-ranking soldier, was instrumental in developing the Bermuda Regiment. A number of other Bermudians and their descendants had preceded him into senior ranks, including Bahamian-born Admiral Lord Gambier, and Bermudian-born Royal Marines Brigadier Harvey. When promoted to Brigadier at age 39, following his wounding at the Anzio landings, Harvey became the youngest-ever Royal Marine Brigadier. The Cenotaph in front of the Cabinet Building (in Hamilton) was erected in tribute to Bermuda's Great War dead (the tribute was later extended to Bermuda's Second World War dead) and is the site of the annual Remembrance Day commemoration.
Document 7: Red coat (military uniform): Red coat or Redcoat is a historical item of military clothing used widely, though not exclusively worn, by most regiments of the British Army from the 17th to the 20th centuries. From the mid-17th century to the 19th century, the uniform of most British soldiers (apart from artillery, rifles and light cavalry) included a madder red coat or coatee. From 1873 onwards, the more vivid shade of scarlet was adopted for all ranks, having previously been worn only by officers, sergeants and all ranks of some cavalry regiments.
Document 8: Eton College: The long-standing claim that the present uniform was first worn as mourning for the death of George III is unfounded. "Eton dress" has undergone significant changes since its standardisation in the 19th century. Originally (along with a top-hat and walking-cane), Etonian dress was reserved for formal occasions, but boys wear it today for classes, which are referred to as "divisions", or "divs". As stated above, King's Scholars wear a black gown over the top of their tailcoats, and occasionally a surplice in Chapel. Members of the teaching staff (known as Beaks) are required to wear a form of school dress when teaching.
Document 9: Navy blue: Navy blue got its name from the dark blue (contrasted with white) worn by officers in the British Royal Navy since 1748 and subsequently adopted by other navies around the world. When this color name, taken from the usual color of the uniforms of sailors, originally came into use in the early 19th century, it was initially called "marine blue", but the name of the color soon changed to "navy blue".
Document 10: British Army during the Second World War: The pre-war British Army was trained and equipped to be a small, mechanised, professional army. Its main function was to garrison the British Empire. It became evident early in the war that its initial structure and manpower was woefully unprepared and ill - equipped for a war with multiple enemies on multiple fronts. The British Army, an all - volunteer force until 1939, was small in comparison to its enemies at the start of the Second World War in 1939, as it had been in the First World War. By the end of the Second World War, however, over 3.5 million men had served in the British Army.
Document 11: William Lumley: General Sir William Lumley, (28 August 1769 – 15 December 1850) was a British Army officer and courtier during the late eighteenth and early nineteenth centuries. The son of the Earl of Scarborough, Lumley enjoyed a rapid rise through the ranks aided by a reputation for bravery and professionalism established on campaign in Ireland, Egypt, South Africa, South America, Italy, Portugal and Spain. Following his retirement from the army due to ill health in 1811, Lumley served as Governor of Bermuda and later gained a position as a courtier to the Royal Household. Lumley is especially noted for his actions at the Battle of Antrim where he saved the lives of several magistrates and was seriously wounded fighting hand-to-hand with United Irish rebels in the Irish Rebellion of 1798.
Document 12: United States Air Force: The first USAF dress uniform, in 1947, was dubbed and patented "Uxbridge Blue" after "Uxbridge 1683 Blue", developed at the former Bachman-Uxbridge Worsted Company. The current Service Dress Uniform, which was adopted in 1993 and standardized in 1995, consists of a three-button, pocketless coat, similar to that of a men's "sport jacket" (with silver "U.S." pins on the lapels, with a silver ring surrounding on those of enlisted members), matching trousers, and either a service cap or flight cap, all in Shade 1620, "Air Force Blue" (a darker purplish-blue). This is worn with a light blue shirt (Shade 1550) and Shade 1620 herringbone patterned necktie. Enlisted members wear sleeve insignia on both the jacket and shirt, while officers wear metal rank insignia pinned onto the coat, and Air Force Blue slide-on epaulet loops on the shirt. USAF personnel assigned to Base Honor Guard duties wear, for certain occasions, a modified version of the standard service dress uniform, but with silver trim on the sleeves and trousers, with the addition of a ceremonial belt (if necessary), wheel cap with silver trim and Hap Arnold Device, and a silver aiguillette placed on the left shoulder seam and all devices and accoutrement.
Document 13: The Troubles: The Troubles Political map of Ireland Date 1968 -- 1998 Location Northern Ireland Violence occasionally spread to the Republic of Ireland, England, and mainland Europe Result Military stalemate Good Friday Agreement (1998) St Andrews Agreement (2006) Withdrawal of British forces taking part in Operation Banner Disarmament of paramilitary groups Continuing low - level armed conflict Belligerents State security forces United Kingdom British Armed Forces Royal Ulster Constabulary Ireland Irish Defence Forces Gardaí Irish republican paramilitaries Provisional IRA Official IRA (1969 -- 1972) Irish National Liberation Army (INLA) (1974 -- 1998) Irish People's Liberation Organisation (IPLO) (1986 -- 1992) Continuity IRA (1994 --) Real IRA (1997 --) Supported by: Libya (arms shipments) Ulster loyalist paramilitaries Ulster Volunteer Force (UVF) Ulster Defence Association (UDA) Red Hand Commando (RHC) Ulster Resistance (UR) (1986 -- 1989) Loyalist Volunteer Force (LVF) (1996 -- 1999) Casualties and losses British Army: 705 ∟ (inc. UDR) RUC: 301 NIPS: 24 TA: 7 Other UK police: 6 Royal Air Force: 4 Royal Navy: 2 Total: 1,049 Irish Army: 1 Gardaí: 9 IPS: 1 Total: 11 PIRA: 291 INLA: 39 OIRA: 27 IPLO: 9 RIRA: 2 Total: 368 UDA: 91 UVF: 62 RHC: 4 LVF: 3 UR: 2 Total: 162 Civilians killed: 1,841 (or 1,935 inc. ex-combatants) Total dead: 3,532 Total injured: 47,500 + All casualties: around 50,000
Document 14: Cornwallis in Ireland: British General Charles Cornwallis, the 1st Marquess Cornwallis was appointed in June 1798 to serve as both Lord Lieutenant of Ireland and Commander-in-Chief of Ireland, the highest civil and military posts in the Kingdom of Ireland. He held these offices until 1801.
Document 15: Service Dress (British Army): Service Dress was the new style of khaki service dress uniform introduced by the British Army for use in the field from the early 1900s, following the experiences of a number of imperial wars and conflicts, including the Second Boer War. This variant of uniform continues to be worn today, although only in a formal role, as No. 2 Pattern dress.
ground_truth: early 1900s
sub_queries: Vernon Erskine-Crum >> military branch Answer: British Army
when did British Army start wearing khaki Answer: early 1900s