paragraph_text: World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier. The vast majority of the world's countries -- including all of the great powers -- eventually formed two opposing military alliances: the Allies and the Axis. It was the most global war in history; it directly involved more than 100 million people from over 30 countries. In a state of total war, the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. World War II was the deadliest conflict in human history, marked by 50 to 85 million fatalities, most of which were civilians in the Soviet Union and China. It included massacres, the genocide of the Holocaust, strategic bombing, premeditated death from starvation and disease and the only use of nuclear weapons in war.

paragraph_text: Princess Antoinette of Saxe-Coburg-Saalfeld (Antoinette Ernestine Amalie; 28 August 1779 – 14 March 1824) was a German princess of the House of Wettin. By marriage, she was a Duchess of Württemberg. Through her eldest surviving son, she is the ancestress of today's (Catholic) House of Württemberg.

paragraph_text: Omanthai railway station ( "Ōmantai toṭaruntu nilaiyam") is a railway station in the town of Omanthai in northern Sri Lanka. Owned by Sri Lanka Railways, the state-owned railway operator, the station is part of the Northern Line which links the north with the capital Colombo. The popular Yarl Devi service calls at the station. The station was not functioning between 1990 and 2009 due to the civil war. It was re-opened on 27 May 2011.

paragraph_text: Kokuvil railway station ( "Kokkuvil toṭaruntu nilaiyam") is a railway station in the town of Kokuvil in northern Sri Lanka. Owned by Sri Lanka Railways, the state-owned railway operator, the station is part of the Northern Line which links the north with the capital Colombo. The popular Yarl Devi service calls at the station. The station was not functioning between 1990 and 2015 due to the civil war. The Northern Line between Jaffna and Kankesanthurai was re-opened on 2 January 2015.

paragraph_text: Sophie Marie of Hesse-Darmstadt (7 May 1661, Darmstadt – 22 August 1712, Gotha) was a member of the House of Hesse and by marriage Duchess of Saxe-Eisenberg.

paragraph_text: On 11 December 1941, four days after the Japanese attack on Pearl Harbor and the United States declaration of war against the Japanese Empire, Nazi Germany declared war against the United States, in response to what was claimed to be a series of provocations by the United States government when the US was still officially neutral during World War II. The decision to declare war was made by Adolf Hitler, apparently offhand, almost without consultation. Later that day, the United States declared war on Germany.

paragraph_text: Mankulam railway station ( "Māṅkuḷam toṭaruntu nilaiyam") is a railway station in the town of Mankulam in northern Sri Lanka. Owned by Sri Lanka Railways, the state-owned railway operator, the station is part of the Northern Line which links the north with the capital Colombo. The popular Yarl Devi service calls at the station. The station was not functioning between 1990 and 2013 due to the civil war. The Northern Line between Omanthai and Kilinochchi, which includes Mankulam, was re-opened on 14 September 2013.

paragraph_text: Princess Tatiana Konstantinovna of Russia (Russian: Княжна Татьяна Константиовна; 23 January 1890 – 28 August 1979) was the third child and oldest daughter of Grand Duke Konstantin Konstantinovich of Russia and wife, Princess Elisabeth of Saxe-Altenburg.

paragraph_text: Princess Sophie of Saxe-Hildburghausen (Ernestine Friederike Sophie; 22 February 1760, Hildburghausen – 28 October 1776, Coburg), was a Princess of Saxe-Hildburghausen by birth, and by marriage she became the Hereditary Princess of Saxe-Coburg-Saalfeld.

paragraph_text: Paranthan railway station ( "Parantaṉ toṭaruntu nilaiyam") is a railway station in the town of Paranthan in northern Sri Lanka. Owned by Sri Lanka Railways, the state-owned railway operator, the station is part of the Northern Line which links the north with the capital Colombo. The popular Yarl Devi service calls at the station. The station was not functioning between 1990 and 2014 due to the civil war. The Northern Line between Kilinochchi and Pallai, which includes Paranthan, was re-opened on 4 March 2014.

paragraph_text: Princess Charlotte of Saxe-Meiningen () (11 September 1751, Frankfurt am Main, Free Imperial City of Frankfurt, Holy Roman Empire – 25 April 1827, Genoa, Kingdom of Sardinia) was a member of the House of Saxe-Meiningen and a Princess of Saxe-Meiningen by birth and a member of the House of Saxe-Gotha-Altenburg and Duchess consort of Saxe-Gotha-Altenburg through her marriage to Ernest II, Duke of Saxe-Gotha-Altenburg.

paragraph_text: Sophie Hedwig of Saxe-Merseburg (4 August 1660 - 2 August 1686), was a German noblewoman member of the House of Wettin and by marriage Duchess of Saxe-Saalfeld.

paragraph_text: Princess Marie Alexandrine of Saxe-Weimar-Eisenach ("Marie Alexandrine Anne Sophie Auguste Helene"; 20 January 1849 – 6 May 1922) was the eldest daughter and second child of Charles Alexander, Grand Duke of Saxe-Weimar-Eisenach and his wife Princess Sophie of the Netherlands.

paragraph_text: Princess Sophie of Greece and Denmark (; 26 June 1914 – 24 November 2001) was the fourth child and youngest daughter of Prince Andrew of Greece and Denmark and Princess Alice of Battenberg. The Duke of Edinburgh is her younger brother. Sophie was born at Villa Mon Repos on the island of Corfu in Greece.

paragraph_text: There are six railway stations in the town of Coburg in Bavaria, southern Germany. These include: two passenger stations, three halts and one goods station.

paragraph_text: Sophie, Princess of Windisch-Graetz (born Archduchess Sophie Franziska Maria Germaine of Austria, 19 January 1959) is a French-born Austrian designer. She is a member, by birth, of the House of Habsburg-Lorraine, and by marriage of the Austrian House of Windisch-Graetz.

paragraph_text: Princess Ernestine of Saxe-Weimar-Eisenach (Ernestine Auguste Sophie; 4 January 1740 in Weimar – 10 June 1786 in Hildburghausen) was a princess of Saxe-Weimar-Eisenach and by marriage Duchess of Saxe-Hildburghausen.

paragraph_text: Float Railway Station was a former station on the Inny Junction to Cavan branch of the Midland Great Western Railway, Ireland. It opened in 1856 and closed in 1947. Due to the fuel shortage caused by World War Two, the station was closed for over a year and a half in 1944-1945.

paragraph_text: Salzwedel station was built in 1870 during the construction of the Stendal–Uelzen railway (part of the America Line from Berlin to Bremen and Bremerhaven) by the Magdeburg-Halberstadt Railway Company. Railways formerly ran in seven directions from Salzwedel station or Salzwedel Neustadt station (which lay to the immediate east), as the table below shows. A locomotive depot (Bahnbetriebswerk) was built directly next to it in order to service these routes. During the Second World War, the station area was destroyed in an air raid on 22 February 1945, which caused about 300 deaths. Of the seven lines, only the Stendal–Uelzen railway remain. During the division of Germany the line was cut at the border, but continuous operations were restored on 19 December 1999. It has been extensively modernised since reunification and electrified so that it can be used an alternative route for Intercity-Express train from Berlin to Hamburg.

paragraph_text: Themar is a town in the district of Hildburghausen, in Thuringia, Germany. It is situated on the river Werra, 11 km northwest of Hildburghausen, and 14 km southwest of Suhl.

Question: During WWII, when did America declare war on the country that has railway stations in the place where Princess Sophie of Saxe-Hildburghausen died?
Answer: 11 December 1941