paragraph_text: Captain Frederick Elliott Brown was a Canadian World War I flying ace credited with 10 aerial victories. He returned to military service during World War II.

paragraph_text: Dennis Hart Mahan [məˈhæn] (April 2, 1802 – September 16, 1871) was a noted American military theorist, civil engineer and professor at the United States Military Academy at West Point from 1824-1871. He was the father of American naval historian and theorist Rear Admiral Alfred Thayer Mahan. Of his other four children, his son Frederick August Mahan also graduated from West Point in 1867.

paragraph_text: The offices of elder and ministerial servant were restored to Witness congregations in 1972, with appointments made from headquarters (and later, also by branch committees). It was announced that, starting in September 2014, appointments would be made by traveling overseers. In a major organizational overhaul in 1976, the power of the Watch Tower Society president was diminished, with authority for doctrinal and organizational decisions passed to the Governing Body. Since Knorr's death in 1977, the position of president has been occupied by Frederick Franz (1977–1992) and Milton Henschel (1992–2000), both members of the Governing Body, and since 2000 by Don A. Adams, not a member of the Governing Body. In 1995, Jehovah's Witnesses abandoned the idea that Armageddon must occur during the lives of the generation that was alive in 1914 and in 2013 changed their teaching on the "generation".

paragraph_text: The video for the song, considered by many to be a definitive music video for Aerosmith, starts off with the band walking up to a department store elevator, and an attractive woman (Brandi Brandt) says ``2nd floor... hardware, children's wear, lady's lingerie. Oh, good morning Mr. Tyler, going down? ''Steven Tyler enters the elevator and the song starts.

paragraph_text: Her father, Margrave John Frederick of Brandenburg-Ansbach, belonged to a branch of the House of Hohenzollern and was the ruler of a small German state, the Principality of Ansbach. Caroline was orphaned at a young age and moved to the enlightened court of her guardians, King Frederick I and Queen Sophia Charlotte of Prussia. At the Prussian court, her previously limited education was widened, and she adopted the liberal outlook possessed by Sophia Charlotte, who became her good friend and whose views influenced Caroline all her life.

paragraph_text: The Republic of China Military Police (ROCMP; ) is a military police body under the Ministry of National Defense of Taiwan (Republic of China). Unlike military police in many other countries, ROCMP is a separate branch of the ROC Armed Forces. ROCMP is responsible for protecting government leaders from assassination or capture, guarding Taiwan’s strategic facilities, and counterintelligence against enemy infiltrators, spies, and saboteurs.

paragraph_text: In the same war, the Prussian Edward Schnell served the Aizu domain as a military instructor and procurer of weapons. He was granted the Japanese name Hiramatsu Buhei (平松武兵衛), which inverted the characters of the daimyo's name Matsudaira. Hiramatsu (Schnell) was given the right to wear swords, as well as a residence in the castle town of Wakamatsu, a Japanese wife, and retainers. In many contemporary references, he is portrayed wearing a Japanese kimono, overcoat, and swords, with Western riding trousers and boots.

paragraph_text: Frederick Edgar Ferguson (born August 18, 1939) is a former United States Army warrant officer and later officer, as well as a recipient of the United States military's highest decoration—the Medal of Honor—for his actions in the Vietnam War while a chief warrant officer 3.

paragraph_text: The American Hockey League, the top minor league in North America required all players to wear a visor prior to the start of the 2006 -- 07 season. The NHL ``strongly recommends ''the use of visors. The NHL mandated visors in 2013, with an exception for players having 25 games experience.

paragraph_text: The Emperor Wears No Clothes is a non-fiction book written by Jack Herer. Starting in 1973, the story begins when Herer takes the advice of his friend, "Captain" Ed Adair, and begins compiling tidbits of information about the "Cannabis" plant and its numerous uses, including as hemp and as a drug. After a dozen years of collecting and compiling historical data, Herer first published his work as "The Emperor Wears No Clothes", in 1985. The twelfth edition was published in November 2010, and the book continues to be cited in Cannabis rescheduling and re-legalization efforts.

paragraph_text: 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.

paragraph_text: The USAF is the only branch of the U.S. military where NCO status is achieved when an enlisted person reaches the pay grade of E-5. In all other branches, NCO status is generally achieved at the pay grade of E-4 (e.g., a Corporal in the Army and Marine Corps, Petty Officer Third Class in the Navy and Coast Guard). The Air Force mirrored the Army from 1976 to 1991 with an E-4 being either a Senior Airman wearing three stripes without a star or a Sergeant (referred to as "Buck Sergeant"), which was noted by the presence of the central star and considered an NCO. Despite not being an NCO, a Senior Airman who has completed Airman Leadership School can be a supervisor according to the AFI 36-2618.

paragraph_text: Stéphanie Szostak (born June 12, 1975) is a French actress who started her career in the early 2000s. Szostak is best known for having appeared in the films The Devil Wears Prada, Dinner for Schmucks, Iron Man 3, and R.I.P.D. Szostak starred in the USA Network original drama series Satisfaction.

paragraph_text: Lieutenant-General Sir Frederick Wellington John Fitzwygram, 4th Baronet (29 August 1823 – 9 December 1904) was a British Army cavalry officer, expert on horses and Conservative politician.

paragraph_text: With Roots Above and Branches Below is the third studio album by American melodic metalcore band The Devil Wears Prada, released on May 5, 2009, through Ferret Music. It charted at No. 11 on the "Billboard" 200, selling 31,000 in its first week.

paragraph_text: The Eritrean Air Force (ERAF) is the official aerial warfare service branch of the Eritrean Defence Forces and is one of the three official uniformed military branches of the State of Eritrea.

paragraph_text: The United States Air Force (USAF) is the aerial warfare service branch of the United States Armed Forces and one of the seven American uniformed services. Initially part of the United States Army, the USAF was formed as a separate branch of the military on 18 September 1947 under the National Security Act of 1947. It is the most recent branch of the U.S. military to be formed, and is the largest and one of the world's most technologically advanced air forces. The USAF articulates its core functions as Nuclear Deterrence Operations, Special Operations, Air Superiority, Global Integrated ISR, Space Superiority, Command and Control, Cyberspace Superiority, Personnel Recovery, Global Precision Attack, Building Partnerships, Rapid Global Mobility and Agile Combat Support.

paragraph_text: 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.

paragraph_text: Gleb Vseslavich (, ) (died September 13, 1119) was the prince of Minsk between 1101 and 1119. During his reign Minsk was at war with Kiev and Polatsk. He started the Minsk branch of Prince of Polotsk as son of Vseslav the Seer.

paragraph_text: Frederick Steele (January 14, 1819 – January 12, 1868) was a career military officer in the United States Army, serving as a major general in the Union Army during the American Civil War. He was most noted for his successful campaign to retake much of secessionist Arkansas for the Union cause.

Question: When did the military branch Frederick Fitzwygram served in start wearing khaki?
Answer: early 1900s