Captain Richard Aveline Maybery MC* (4 January 1895 – 19 December 1917) was a Welsh flying ace in the First World War.

Maybery was born in Brecon, Wales, on 4 January 1895, the only son of Aveline Maybery, a solicitor, and his wife Lucy. He was educated locally and at Wellington College, Berkshire, before going on to the Royal Military College, Sandhurst.

After his graduation he was commissioned as a second lieutenant in the 21st (Empress of India's) Lancers on 17 September 1913. At the outbreak of the war he was serving in the North West Frontier Province where he was promoted to lieutenant on 31 October 1914. After being seriously wounded in action at Shabqadar on 15 September 1915, Maybery became bored during his rehabilitation and, unable to sit on a horse, became involved in observing for a unit of the Royal Flying Corps who were based nearby. He was eventually seconded to the RFC, and appointed a flying officer (observer) on 10 October 1916, with seniority from 21 August 1916. Later he travelled to Egypt where he trained to be a pilot, being appointed a flying officer on 11 April 1917, and was posted to France to serve in No. 56 Squadron, alongside aces James McCudden, Arthur Rhys Davids and Keith Muspratt.

Aggressive and headstrong, Maybery quickly accumulated a high victory tally, accounting for 21 enemy aircraft between 7 July and 19 December 1917. He was awarded the Military Cross on 26 September, and on 18 November was appointed a flight commander with the temporary rank of captain. His second Military Cross was awarded on 17 December.

Moments after his final victory on 19 December, shooting down an Albatros D.V over Bourlon Wood, Maybery's SE5a was either hit by fire from a mobile anti-aircraft battery (credited to K-Flakbatterie 108 commanded by Leutnant Thiel), or shot down by Vizefeldwebel Artur Weber of Jasta 5, and crashed near the village of Haynecourt. His wartime tally consisted of 16 destroyed (two shared), and five driven down 'out of control'.

Maybery was buried in Haynecourt by the Germans, but after the war was re-interred at Flesquieres Hill British Cemetery, Nord, France.

A marble plaque dedicated to the memory of Richard Aveline Maybery, can be found in Brecon Cathedral. The plaque includes the prayer:

"Almighty God..... enable us who remain in the safety of our homes to be worthy of those who have died for us... grant us with a willing spirit to do whatever duty may be laid upon us."

Military Cross

Lieutenant Richard Aveline Maybery, Lancers and Royal Flying Corps.

"For conspicuous gallantry and devotion to duty. After attacking two aerodromes in succession at very low altitudes, and inflicting considerable damage, he attacked and dispersed a number of mounted men and then attacked a goods train. He next attacked and shot down a hostile machine at 500 feet, and before returning attacked a passenger train. On numerous occasions he has attacked, single handed, large hostile formations and set a fine example by his gallantry and determination."

Bar to the Military Cross

Lieutenant Richard Aveline Maybery, Lancers and Royal Flying Corps

"For conspicuous gallantry and devotion to duty as leader of offensive patrols for three months, during which he personally destroyed nine enemy aeroplanes and drove down three out of control. On one occasion, having lost his patrol, he attacked a formation of eight enemy aeroplanes. One was seen to crash and two others went down, out of control, the formation being completely broken up.

List of aerial victories

No.	Date/Time	Aircraft/ Serial No.	Foe	Result	Location	Notes
1	7 July 1917 0830-0915	S.E.5a (A8934)	Albatros D.V	Driven down out of control	Henin-Liétard
2	12 July 1917 2000-2030	S.E.5a (A8934)	Albatros D.V	Destroyed	Dadizeele
3	16 July 1917 1815-1915	S.E.5a (A8934)	Albatros D.V	Driven down out of control	Polygon Wood
4	23 July 1917 1945-2045	S.E.5a (A8934)	Albatros D.V	Destroyed	Moorslede
5	27 July 1917 1930-2045	S.E.5a (A8934)	Albatros D.III	Driven down out of control	North-east of Roulers
6	31 July 1917 0445-0615	S.E.5a (A8934)	Type C	Destroyed	Wevelgem
7	10 August 1917 1845-2015	S.E.5a (B502)	Albatros D.III	Destroyed	South of Roulers
8			Albatros D.III	Destroyed	North of Houthoulst Forest	Shared with Lieutenant V. P. Cronyn
9	22 August 1917 1845-1930	S.E.5a (A4859)	Albatros D.V	Destroyed	Clerkavenhoek
10	3 September 1917 1845-1915	S.E.5a (B508)	Albatros D.V	Destroyed	Houthem	Shared with Second Lieutenant Arthur Rhys-Davids
11	5 September 1917 1815-1915	S.E.5a (B508)	Albatros D.V	Destroyed	Moorslede
12	10 September 1917 1740-1845	S.E.5a (B508)	Albatros D.V	Destroyed	South-east of Houthoulst Forest
13			Albatros D.V	Driven down out of control	Zonnebeke-Moorslede
14	30 September 1917 1700-1800	S.E.5a (B528)	Pfalz D.III	Destroyed	West of Roulers
15	2 October 1917 1030-1145	S.E.5a (B542)	Albatros D.III	Destroyed	Rollegem-Kapelle
16	28 October 1917 0830-0855	S.E.5a (B511)	Albatros D.V	Destroyed	Dadizeele
17	31 October 1917 0855-1115	S.E.5a (B595)	Albatros D.III	Driven down out of control	East of Ledegem
18	31 October 1917 1445	S.E.5a (B595)	Albatros D.V	Destroyed	South-west of Roulers
19	30 November 1917	S.E.5a (B501)	Albatros D.V	Destroyed	Bourlon Wood
20			Albatros D.V	Destroyed	Bourlon Wood
21	19 December 1917 1250	S.E.5a (B506)	Albatros D.V	Destroyed	Bourlon Wood

"...He (Captain Maybery) and Captain Ball and Lieutenant Rhys Davids did more harm to the morale of the German Flying Corps than any other fifteen pilots between them. They all, always, took on any odds. They were too brave and reckless."

— Reminiscence of Captain Duncan Grinnell-Milne, Commanding Officer of No. 56 Squadron RFC, upon hearing news of the death of Captain Richard Maybery.