Question: Q1: In what unofficial ceasefire was Alfred Anderson the last known combatant to participate in.

Context paragraphs:
C. Alfred &quot;Chief&quot; Anderson: Charles Alfred Anderson, Sr., (February 9, 1907 – April 13, 1996) was an American aviator who is known as the "The Father of Black Aviation".

One Parliament for Australia: One Parliament for Australia was a minor Australian political party that contested the 1943 federal election.  It was founded by butcher and company owner Alfred Anderson.

Andersonite: Andersonite, NaCa(UO)(CO)·6HO, or hydrated sodium calcium uranyl carbonate is a rare uranium carbonate mineral that was first described in 1948.  Named after Charles Alfred Anderson (1902–1990) of the United States Geological Survey, who first described the mineral species, it is found in sandstone-hosted uranium deposits.  It has a high vitreous to pearly luster and is fluorescent.  Andersonite specimens will usually glow a bright lemon yellow (or green with blue hints depending on the deposit) in ultraviolet light.  It is commonly found as translucent small rhombohedral crystals that have angles close to 90 degrees although its crystal system is nominally trigonal.  Its Mohs hardness is 2.5, with an average specific gravity of 2.8.

Hugh Anderson (Unionist politician): Hugh Alfred Anderson (26 November 1867 – 16 June 1933) was an Irish Unionist politician.  He was elected Member of Parliament for North Londonderry in December 1918, resigning early in 1919.

North Londonderry by-election, 1919: The North Londonderry by-election of 1919 was held on 4 March 1919.  The by-election was held due to the resignation of the incumbent Irish Unionist MP, Hugh Alfred Anderson.  It was won by the Irish Unionist candidate Hugh Thom Barrie.  Barrie's Sinn Féin opponent, Patrick McGilligan, would later become Irish Minister for External Affairs.

Ernest H. Buehl, Sr.: Ernest H. Buehl, Sr. (1897-1990) was a German-born aviator and aviation figure.  He opened three airports, opened new flying routes, worked as a mechanic, operated a flying school and trained hundreds of pilots, including C. Alfred Anderson, who became the lead trainer of the Tuskegee Airmen.

Beth Garmaï (East Syrian Ecclesiastical Province): The region of Beth Garmai (Syriac: ܒܝܬܓܪܡܝ ) in northern Iraq, bounded by the Little Zab and Diyala Rivers and centered on the town of Karka d'Beth Slokh (Syriac: ܟܪܟܐ ܕܒܝܬ ܣܠܘܟ , modern Kirkuk), was a metropolitan province of the Church of the East between the fifth and fourteenth centuries.  Several bishops and metropolitans of Beth Garmaï are mentioned between the fourth and fourteenth centuries, residing first at Shahrgard, then at Karka d'Beth Slokh, later at Shahrzur and finally at Daquqa.  The known suffragan dioceses of the metropolitan province of Beth Garmaï included Shahrgard, Lashom (ܠܫܘܡ ), Khanijar, Mahoze d'Arewan (ܡܚܘܙܐ ܕܐܪܝܘܢ ), Radani, Hrbath Glal (ܚܪܒܬܓܠܠ ), Tahal and Shahrzur.  The suffragan dioceses of 'Darabad' and 'al-Qabba', mentioned respectively by Eliya of Damascus and Mari, are probably to be identified with one or more of these known dioceses.  The diocese of Gawkaï, attested in the eighth and ninth centuries, may also have been a suffragan diocese of the province of Beth Garmaï.  The last known metropolitan of Beth Garmaï is attested in the thirteenth century, and the last known bishop in 1318, though the historian ʿ Amr continued to describe Beth Garmai as a metropolitan province as late as 1348.  It is not clear when the province ceased to exist, but the campaigns of Timur Leng between 1390 and 1405 offer a reasonable context.

Christmas truce: The Christmas truce (German: "Weihnachtsfrieden" ; French: "Trêve de Noël" ) refers to a series of widespread but unofficial ceasefires along the Western Front of World War I around Christmas 1914.

Hans A. Anderson: Hans Alfred Anderson (March 4, 1855 – October 9, 1939) was an American jurist and politician.

Alfred Anderson (veteran): Alfred Anderson (25 June 1896 – 21 November 2005) was a Scottish joiner and veteran of the First World War.  He was the last known holder of the 1914 Star (the Old Contemptibles), the last known combatant to participate in the 1914 World War I Christmas truce, Scotland's last known World War I veteran, and Scotland's oldest man for more than a year.

Supporting paragraphs: Alfred Anderson (veteran) Christmas truce
Answer: The Christmas truce