Question: What is the birth date of this Field Marshal during WWII, who created the Fall Martin plan?

Context paragraphs:
Field marshal (India): Field marshal (or field marshal, abbreviated as FM) ( , ) is a five–star general officer rank and the highest attainable rank in the Indian Army.  Field marshal is ranked immediately above general, but not exercised in the regular army structure.  It is a largely ceremonial or wartime rank, having been awarded only twice.  A field marshal's insignia consists of the national emblem over a crossed baton and sabre in a lotus blossom wreath.

Sarath Fonseka: Field Marshal Gardihewa Sarath Chandralal Fonseka, RWP, RSP, VSV, USP, MP, rcds, psc (Sarath Fonseka) (Sinhalese: ෆීල්ඩ් මාෂල් සරත් ෆොන්සේකා , Tamil: பீல்ட் மார்ஷல் சரத் பொன்சேகா , born 18 December 1950) is a Sri Lanka's highest rank soldier and politician who was the first Sri Lankan Army officer to be promoted to the rank of Field Marshal.  He was the eighteenth Commander of Sri Lankan Army, and under his command the Sri Lankan Army ended the 26-year Sri Lankan Civil War in 2009, defeating the rebel Liberation Tigers of Tamil Eelam; he thereafter briefly served as the Chief of Defence Staff.  After retiring from the Army with the rank of General, he entered politics as the common opposition candidate in the 2010 presidential election contesting against President Mahinda Rajapaksa.  Following his controversial defeat in the presidential election he was elected to Parliament in the general election that followed.  Soon after he was made a political prisoner and lost his parliamentary seat.  Fonseka supported Maithripala Sirisena in the 2015 presidential election and following his victory, the newly appointed President Sirisena gave Fonseka a full pardon reinstating his civic rights, military rank and decorations.  Later he was promoted to the newly created rank of Field Marshal on 22 March 2015.  On 9 February 2016 he was appointed to Parliament, and he was appointed Cabinet Minister for Regional Development on 25 February 2016.

List of Generalobersts: Generaloberst, in English Colonel General, was, in Germany and Austria-Hungary—the German "Reichswehr" and "Wehrmacht", the Austro-Hungarian Common Army, and the East German National People's Army, as well as the respective police services—the second highest general officer rank, ranking above full general but below general field marshal.  It was equivalent to "Generaladmiral" in the "Kriegsmarine" until 1945, or to Flottenadmiral in the "Volksmarine" until 1990.  The rank was the highest ordinary military rank and the highest military rank awarded in peacetime; the higher rank of general field marshal was only awarded in wartime by the head of state.  In general, a Generaloberst had the same privileges as a general field marshal.

Lieutenant field marshal: Lieutenant field marshal, also frequently historically field marshal lieutenant (German: "Feldmarschall-Leutnant" , formerly "Feldmarschallleutnant", historically also "Feldmarschall-Lieutenant" and, in official Imperial and Royal Austrian army documents from 1867 always "Feldmarschalleutnant", abbreviated "FML"), was a senior army rank in certain European armies of the 17th to 20th centuries.  It emerged as the rank of field marshal (German: "Feldmarschall" ) came to be used for the highest army commander in the 17th century (having originally been the equivalent of a cavalry colonel).  In German-speaking countries the commander-in-chief usually appointed an "under marshal" ("Untermarschall") or "lieutenant field marshal" to support and represent the field marshal.  Amongst his functions as the personal deputy to the field marshal, were the supervision of supply depots and routes, and inspection of the guards.

Astro Boy (2003 TV series): Astro Boy (アストロボーイ・鉄腕アトム , Asutoro Bōi: Tetsuwan Atomu , lit.  "Astro Boy: Mighty Atom") is a remake of the 1960s anime series of the same name created by Osamu Tezuka, which was produced by his company, Tezuka Productions, Sony Pictures Entertainment Japan, Dentsu, and Fuji Television network.  It was also shown on Animax, who have broadcast the series across its respective networks worldwide, including Japan, Southeast Asia, South Asia, East Asia, and other regions.  It was created to celebrate the birth date of Atom/Astro Boy (as well as the 40th anniversary of the original TV series).  Under the original English name (instead of "Mighty Atom"), it kept the same classic art style as the original manga and anime, but was revisioned and modernized with more lush, high-quality, near-theatrical animation and visuals.  It combined the playfulness of the early anime with the darker, more serious and dramatic Science fiction themes of the manga and the 1980 series.  The anime broadcast in Japan on the same date as Atom's/Astro's birth in the manga (April 6, 2003) across Animax and Fuji Television.  It was directed by Kazuya Konaka and written by Chiaki J. Konaka at the beginning of the series.  Other writers included were Keiichi Hasegawa, Sadayuki Murai, Ai Ohta, Hirotoshi Kobayashi, Kenji Konuta, and Marc Handler, who was also executive story editor.

Kodandera M. Cariappa: Field Marshal Kodandera "Kipper" Madappa Cariappa, OBE (28 January 1899 – 15 May 1993) was the first Indian commander-in-chief (C-in-C) of the Indian Army.  He led Indian forces on the Western Front during the Indo-Pakistani War of 1947.  He is one of only two Indian Army officers to hold the five-star rank of field marshal; the other being Field Marshal Sam Manekshaw.  He was appointed commander-in-chief of the Indian Army in 1949.

Thomas D. Singleton: Thomas Day Singleton (Birth date unknown – November 25, 1833) was a United States Representative from South Carolina.  He was born near Kingstree, South Carolina but his birth date is unknown.

Fall Martin: Fall Martin ("Case Martin") was a plan created by Field Marshal Gerd von Rundstedt in late 1944 during World War II.  The plan envisaged a two-pronged attack aimed at the Allied forces in eastern Belgium and Luxembourg.

Nir Shamsher Jang Bahadur Rana: Born on 11 Poush, 1970 B.S. (1913) in Jawalakhel Durbar, Jawalakhel, Lalitpur, Field Marshal Rana died at the age of 99.  He was son of the then ruling Rana Prime Minister Judha Shumsher Rana and his third wife Mahila Maharani (née Musa "Nani Sahib").  According to a statement, the centenarian Field Marshal had joined the then Royal Nepal Army (RNA) at the age of 18 on 1 Shrawan 1988 B.S (1931) and was appointed to the post of Major at the Shri Pashupati Prasad Battalion.  He became the Commander-in-Chief of the RNA on 15 Baisakh, 2017 B.S (1960) and retired on 15 Baisakh in 2022 B.S (1965).  He was appointed Field Marshal after his retirement in 2022 B.S.

Gerd von Rundstedt: Karl Rudolf Gerd von Rundstedt (12 December 1875 – 24 February 1953) was a Field Marshal in the Wehrmacht of Nazi Germany during World War II.

Supporting paragraphs: Fall Martin Gerd von Rundstedt
Answer: 12 December 1875