Question: There are several railway stations in the city where Ernest Frederick died. When did the U.S. declare war on the country that includes that city?

full_context: Document 1: Ernest Frederick, Duke of Saxe-Coburg-Saalfeld: Ernest Frederick succeeded his father in the Duchy of Saxe-Coburg-Saalfeld when he died in 1764 and established his definitive residence shifted in Coburg. Because of the high indebtedness of the duchy he was compelled by Emperor Joseph II in 1773 to work with a "Debit commission"—an obligatory administration of debts assigned by the emperor—for over thirty years.
Document 2: Consequences of the attack on Pearl Harbor: On December 8, 1941, Japan declared war on the United States and the British Empire. The Japanese document discussed world peace and the disruptive actions of the United States and the United Kingdom. The document claimed all avenues for averting war had been exhausted by the Government of Japan.
Document 3: German declaration of war against the United States: 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.
Document 4: Railway stations in Coburg: 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.
Document 5: Cork (city): Cork was one of the most rail-oriented cities in Ireland, featuring eight stations at various times. The main route, still much the same today, is from Dublin Heuston. Originally terminating on the city's outskirts at Blackpool, the route now reaches the city centre terminus of Kent Station via Glanmire tunnel. Now a through station, the line through Kent connects the towns of Cobh and Midleton east of the city. This also connected to the seaside town of Youghal, until the 1980s.[citation needed]
Document 6: Hannover Hauptbahnhof: In the timetable of summer 1939, Hanover station had a total of 144 scheduled long-distance arrivals and departures. It was the most important junctions on Deutsche Reichsbahn’s long-distance network after the terminal stations of Berlin, Cologne, Frankfurt am Main and the main stations of Leipzig and Duisburg.
Document 7: Military history of the United States during World War II: On 11 December 1941, Adolf Hitler and Nazi Germany declared war against the United States, the same day that the United States declared war on Germany and Italy.
Document 8: Český Krumlov Castle: By the 17th century the Rosenbergs had died out, and Holy Roman Emperor Ferdinand II gave the dominion of Krumau to Hans Ulrich von Eggenberg, naming him Duke of Krumau.  After the death of Hans Ulrich's son, Johann Anton I von Eggenberg, the castle was administered for the period between 1649 and 1664 by his widow, Anna Maria.
Document 9: Kornwestheim station: Kornwestheim station is located in the Ludwigsburg district of Kornwestheim in the German state of Baden-Württemberg. It is located on the Franconia Railway () and is a station on the network of the Stuttgart S-Bahn. It is near the junction of the Untertürkheim–Kornwestheim line ("Schusterbahn") freight bypass. Kornwestheim passenger station was the site of a Deutsche Bahn car train loading facility until December 2007.
Document 10: Princess Sophie of Saxe-Hildburghausen: 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.
Document 11: East Prussia: The Administrator of Prussia, the grandmaster of the Teutonic Order Maximilian III, son of emperor Maximilian II died in 1618. When Maximilian died, Albert's line died out, and the Duchy of Prussia passed to the Electors of Brandenburg, forming Brandenburg-Prussia. Taking advantage of the Swedish invasion of Poland in 1655, and instead of fulfilling his vassal's duties towards the Polish Kingdom, by joining forces with the Swedes and subsequent treaties of Wehlau, Labiau, and Oliva, Elector and Duke Frederick William succeeded in revoking king of Poland's sovereignty over the Duchy of Prussia in 1660. The absolutist elector also subdued the noble estates of Prussia.
Document 12: Hannover Hauptbahnhof: A wooden platform area was built next to the entrance building and on each side of the two tracks. That was enough for the first traffic because the still short trains running to the east and the west stopped at the same platform. There were no through trains initially. The first through train ran from 1 May 1851 between Berlin and Cologne. The first railway workshop was built opposite the station building. In 1853, the opening of the first section of the Southern Railway to Alfeld, Göttingen and Kassel made the through station into a railway junction. A marshalling yard was established in Hainholz to relieve the station in 1868.
Document 13: Victoria, Princess Royal: With the death of King Frederick William IV on 2 January 1861, his brother, who had acted as regent since 1858, ascended the throne as King William I. Frederick was then the new crown prince of Prussia but his situation at court did not change much: his father refused to increase his allowance, and Crown Princess Victoria continued to contribute significantly to the family budget with her dowry and allowance. In a letter to the Baron von Stockmar, Prince Albert commented on the situation:
Document 14: United States declaration of war on Germany (1917): On April 2, 1917, President Woodrow Wilson asked a special joint session of the United States Congress for a declaration of war against the German Empire. Congress responded with the declaration on April 6.
Document 15: United States declaration of war upon Germany (1941): December 11, 1941, the United States Congress declared war upon Germany (Pub. L. 77 -- 331, Sess. 1, ch. 564, 55 Stat. 796), hours after Germany declared war on the United States after the Japanese attack on Pearl Harbor. The vote was 88 -- 0 in the Senate and 393 -- 0 in the House.
ground_truth: 11 December 1941
sub_queries: Ernest Frederick >> place of death Answer: Coburg
Railway stations in Coburg >> country Answer: Germany
when did america declare war on Germany in ww2 Answer: 11 December 1941